双语例句原声例句
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做有机化学需要知道的东西,你们学这门课程将为课程，也就是有机化学打下基础。
So, you'll be learning in this class 512 a great preparation for 512, which is organic chemistry.
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你看，原来某些微生物是化学合成的——它们不需要阳光，因为它们从化学反应中获取能量。
You see, it turns out that certain microorganisms are chemosynthetic—they don't need sunlight because they take their energy from chemical reactions.
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如果你可以只在需要的地方喷洒化学药品，为什么要在整个田地里喷洒呢？
Why dose a whole field with chemicals if you can spray only where they are needed?
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So, you'll be learning in this class 512 a great preparation for 512, which is organic chemistry.
做有机化学需要知道的东西,你们学这门课程将为课程，也就是有机化学打下基础。
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You are required only to put the one or two-letter chemical abbreviation, the symbol.
你们只需要,用一两个字母来代表一个化学元素。
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