底土

bottom soil的用法和样例：

例句

In this experiment the soil in which clams were reared was turned over periodically tosee whether the treatment benefited the growth of the clams.摘要本报告探讨定期翻掘养殖池的底土是否能维持良好的底质，使文蛤有较佳的活存率与成长。

AGRICULTURE REPORT - Soil Conservation Methods

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发表于:2018-12-07 / 阅读(143) / 评论(0)

农业与发展

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发表于:2018-12-07 / 阅读(154) / 评论(0)

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Designing a Quake-Resistant Building Starts at the Soil

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Mars Rover to Begin Taking Soil Samples This Week

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These hardworking houseplants can sweeten every breath you take . Put Your Plants to Work In the early 1980s, when NASA researchers were looking for ways to purify the air inside the space pods of the future , they didn ' t just look to engineer a pr

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[00:05.49]Reading [00:08.36]A PIONEER FOR ALL PEOPLE [00:12.43]He wants everyone to call him a farmer,for that's how he regards himself. [00:19.28]Although he is one of China's most famous scientists, [00:24.45]Yuan Longping works the land to do his

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Feed the Soil, Feed the Crops If African farmers are going to feed the continent, they may first want to feed the soil. Studies show farmland is often depleted of vital nutrients. But researchers say a combination of organic farming methods may help.

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Pioneering Soil Researcher Wins Top Environment Prize Biologist Diana Wall went to the ends of the earth - the seemingly lifeless Antarctic desert - to study the life in soil. What soil life does for us, it provides us with many benefits that we don'

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AGRICULTURE REPORT - Cover Crops Are Good for the Soil (and the Farmer) By Mario Ritter Broadcast: Tuesday, May 24, 2005 I'm Gwen Outen with the VOA Special English Agriculture Report. Cover crops are

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time will not stand still today is the day, the day of salvation living for more than just synthetic force fed existence this is my disposition I will strive for the truth time will not stand still today is the day, the day of salvation living for mo

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学英语单词

body side bearing beam

broad-leaved tree