单词:characteristic curve of electron tube
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Speaking effective American English [00:01.52]流利美语训练妙方 [00:03.03]Now let's talk about duration,the fourth characteristic of effective speech.Words,like musical notes,last for a specific period of time. [00:08.01]现在我们来看看说
春 节 对于全世界的华人来说,中国的新年是最重要的节日。人们也称它为春节或农历新年。 公历春节的确切日期每年都在变化。但是春节一般都在 1 月 1 日 到 2 月 19 日 之间。 在农历中,每
[00:03.15]第二单元 课文A [00:06.30]tax [00:08.07]税(款) [00:09.85]generally [00:11.31]一般地,通常,大体上 [00:12.77]federal [00:14.15]联邦的 [00:15.52]type [00:16.95]类型,种类 [00:18.39]salaried [00:19.87]拿薪水的,领工资的 [00:21.34]salary [00:22.71]
In the square outside the British Library in London is a sculpture of Sir Isaac Newton - The first man who asked why apples seem always to fall towards the centre of the earth. Maybe they chose it for the spot because it shows a great scientist at wo
本讲为2005年下半年新的教学内容,请对照教材听录音! Wind is the characteristic of spring. Women _being_ (be) the weaker and dependent sex , it is only natural that they should cr
Estranged Family Gets Sports Fix in 'Trouble With The Curve' In Trouble With The Curve, Gus Lobel knows more about scouting new talent for baseball teams than anyone else in the business; but his failing eyesight and old-fashioned attitudes may end h
After suffering a life-threatening illness, singer-songwriter Mary Chapin Carpenter had time to reassess her priorities. She came to believe in more fully appreciating the blessings each day brings From NPR News, this is weekend edition. I am Liane
This is Scientific American's 60-Second Science. I'm Sophie Bushwick. Got a minute? The shortest distance between two points may be a straight line, but try telling that to electrons: when current flows down a wire, these particles zig and zag, movin
P: Hey Yang Chen why are you playing Hail to the chief? I thought we were a sports show - are we going political? Y: Not really. You see, Patrick, the presidential election is in its final stretch - the home stretch - the final lap - just like in长跑
Three Scientists Win Nobel Prize in Chemistry Three scientists have won the Nobel Prize for chemistry for their work to simplify and improve the imaging of biomolecules. 三位科学家因为在简化和改善生物分子成像方面的成就获得了诺
to throw a curve to throw for a loop 美国人在打棒球时经常喜欢发曲线球,使球的方向会发生突变,这样给对方造成错觉,不能回击那个球。这和其他球类运动,
Yvonne: This is 6 Minute English, I'm Yvonne Archer and Alice has kindly joined me for today's programme. Hello Alice. Alice: Hi Yvonne. Yvonne: Now Alice, how do you get around London? Alice: Ooh by bus, bicycle and usually the Tube. Yvonne: Aha, an
BBC Learning English London Life Friendliness on the tube Yvonne:I'm Yvonne Archer and this is London Life from bbclearningenglish.com. Hello! In today's programme, we're talking about friendliness on London's tubes. Is there any? As you probably kn
[0:0]efficiency效率,功效 [0:12.1950]elaborate elastic elbow elderly精心计划的,详尽的 橡皮图,松紧带 肘,肘部 较老的,年长的 [1:2.6076]elect electrical electron选举,推选 电的,电气科学的 电子 [1:41.1372]electronic elegant element elementary [2:36.2790]el
But this still doesn't explain why light is able to pass through glass rather than being absorbed as with most solids. 但是这还是不能解释为什么光可以穿透玻璃而不是像其他大多固体那样被吸收。 For that, we need to go a
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今天又要学两个在总统大选年里新闻界时常会用到的习惯用语,而且这两个习惯用语还是从美国人最心爱的消遣活动: 棒球赛中借用来的。 这两个习惯用语都和用牛皮制成的结结实实的棒球有