[网络] 茂金属催化剂；金属茂络合物；金属茂

metallocenes的用法和样例：

例句

Progress on research of novel doubly-bridged metallocenes and their application as catalysts used in olefin polymerization were reviewed.综述了双桥联茂金属催化剂的结构特征及其在催化烯烃聚合方面的研究进展。

Have You Met the Perfect Tenses?

Editors note: This is the third episode of four-part series on verb tenses. Be sure to listen to part one and part two first. For VOA Learning English, this is Everyday Grammar. Today we are going to talk about the perfect verb tenses. Perfect tenses

发表于:2018-11-27 / 阅读(458) / 评论(0)

2016年VOA慢速英语(十二)月

When Harry met Sally

When Harry met Sally Scene 1 When they first meet, Harry is dating Sally's friend, Amanda. They both are leaving the University of Chicago for New York City, and Harry gives Sally a ride. Song: But yo

发表于:2018-11-28 / 阅读(238) / 评论(0)

疯狂英语2003年

蒋健棠英语实用句子14:They met at the party and clicked right away

They met at the party and clicked right away. 他们在派对上认识，马上就说话投机了。 click本指用鼠标来点击，在上句中click指人与人之间很投缘很快就成为好友，这是比较口语的说法。

发表于:2018-12-02 / 阅读(283) / 评论(0)

蒋健棠英语实用句子

英语诗歌:I met a traveller from an antique land

I met a traveller from an antique land Who said: Two vast and trunkless legs of stone Stand in the desert. Near them on the sand, Half sunk, a shattered visage lies, whose frown And wrinkled lip and sneer of cold command Tell that its sculptor well t

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英语诗歌

Kim-Trump Meeting Met with Caution

A meeting between U.S. President Donald Trump and North Korean leader Kim Jong Un seemed unthinkable only months ago. In the last year, the two leaders have exchanged strong insults and threats raising fears of armed conflict on the Korean Peninsula.

发表于:2019-01-03 / 阅读(118) / 评论(0)

2018年VOA慢速英语(三)月

2007年VOA标准英语-7 Dead as US Highway Bridge Collapses in Minnes

By Greg Flakus Houston 02 August 2007 A bridge spanning the Mississippi River in the Midwestern city of Minneapolis collapsed Wednesday, during the evening rush hour, dumping scores of vehicles into the river. At least seven people died and local hos

发表于:2019-01-07 / 阅读(209) / 评论(0)

2007年VOA标准英语（八月）

VOA标准英语2011--Pat Metheny Goes Solo on 'What's It All

Pat Metheny Goes Solo on 'What's It All About' Acclaimed guitarist Pat Metheny returns to playing solo acoustic guitar on a new album of pop standards called What's It All About. It's not every day that you hear a remake of The Stylistics' Betcha By

发表于:2019-01-10 / 阅读(176) / 评论(0)

VOA标准英语2011年(七月)

VOA慢速英语2010年-EXPLORATIONS - Visiting the Met

STEVE EMBER: Im Steve Ember. SHIRLEY GRIFFITH: And Im Shirley Griffith with EXPLORATIONS in VOA Special English. Today we travel to New York City to visit one of the most famous museums in the world. The Metropolitan Museum of Art collection covers f

发表于:2019-01-11 / 阅读(127) / 评论(0)

2010年VOA慢速英语(八)月

VOA标准英语2009年-obama's Chioce For Commerce Secretary Withdraws

President Barack Obama's choice to lead the Commerce Department, Senator Judd Gregg of New Hampshire, has withdrawn his nomination. The Republican lawmaker cites differences with the Democratic president over policy issues, including an economic rec

发表于:2019-01-13 / 阅读(164) / 评论(0)

VOA标准英语2009年(二月)

Everything Old is New Again at Met Breuer Museum

Everything Old is New Again at Met Breuer Museum NEW YORK When it comes to art, perspective is everything. Perhaps that's why directors at New York City's famed Metropolitan Museum of Art decided to shift theirs, setting their sights on a new locatio

发表于:2019-01-14 / 阅读(147) / 评论(0)

VOA标准英语2016年(三月)

英语歌曲:直到我遇见你 The Sunstreak - Until I Met Y

直到我遇见你 The Sunstreak - Until I Met You Until I Met You The Sunstreak I once believed that there was no one for me, until I met you, But I couldnt see how happy I could be, until I met you, Until I met you, You Standing alone, no one to ca

发表于:2019-01-16 / 阅读(265) / 评论(0)

好听的英文歌曲

听歌学英语:温暖情歌Michael Buble - Haven't Met You Y

Havent Met You Yet by Michael Buble I'm not surprised Not everything lasts I've broken my heart so many times I stop keeping track Talk myself in I talk myself out I get all worked up And then I let myself down I tried so very hard not to loose it I

发表于:2019-01-16 / 阅读(180) / 评论(0)

听歌学英语

英文歌曲:深情爵士男声Michael Buble

深情爵士男声Michael Buble Haven't Met You Yet Michael Buble I'm Not Surprised Not Everything Lasts I've Broken My Heart So Many Times, I Stop Keeping Track. Talk Myself In I Talk Myself Out I Get All Worked Up And Then I Let Myself Down. I Trie

发表于:2019-01-16 / 阅读(332) / 评论(0)

好听的英文歌曲

美国国家公共电台 NPR Raise Your (He)art Rate With A Workout At The Met

STEVE INSKEEP, HOST: The Great Hall at New York City's Metropolitan Museum of Art has a way of humbling people and hushing you to prepare for some quiet contemplation. For the next few weeks, though, through March 9, it's also the starting point for

发表于:2019-01-16 / 阅读(158) / 评论(0)

2017年NPR美国国家公共电台2月

新编英语教程第六册unit03_2_The_Night_the_President_Met_the_B

发表于:2019-01-25 / 阅读(210) / 评论(0)

新编大学英语阅读部分

英语情书：The Day We Met我们相遇的日子

Dear Fabrizio, The day we met is the day I will never forget. Over and over I replay our chat and our first telephone conversation in my mind! You are so amazing you drive me crazy! You make me feel so happy and complete. If I hadn't met you. I know

发表于:2019-02-01 / 阅读(144) / 评论(0)

实用英语

英文情书写作范文：The Day We Met我们相遇的日子

发表于:2019-02-04 / 阅读(158) / 评论(0)

英语作文

Nocerino scores hat-trick as AC Milan beats Parma 4-1

ROME, Oct. 26 (Xinhua) -- Antonio Nocerino turned out to be the unexpected hat-trick hero as AC Milan beat Parma at home on Wednesday to notch up their third consecutive Serie A victory. Nocerino broke the deadlock at San Siro in the 30th minute. Zlt

发表于:2019-02-04 / 阅读(259) / 评论(0)

英语新闻

The Day I Met Lance Armstrong

So there I was at seven thirty in the a.m., perched on my scooter at an intersection waiting to turn. I was sitting at the lights lost in my own thoughts when all of a sudden I became aware of a presence no, not a poltergeist; a bloke on a mountain b

发表于:2019-02-07 / 阅读(215) / 评论(0)

阅读空间

omg美语：0313 OMG! 美语 How I Met Your Mother: Settle Down!

《How I Met Your Mother》里面的口语美语! 1) Settle down 跟女友或者男友定下来 You've been with Ryan for 3 years! Are you ready to settle down? 你和Ryan在一起已经有3年了！你们准备好定下来吗？I am SO ready for him

发表于:2019-03-02 / 阅读(187) / 评论(0)

OMG美语

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学英语单词

acetyl cellulose powder