But it is getting an environmental make-over.
VOA: special.2009.05.22
So if you're trying to make a more complicated organic molecule carbon-carbon bonds are one of the most difficult things to make in organic chemistry, and it turns out that c n minus is a very reactive molecule, so it's a good way, even though we'll go over some drawbacks in a second, it is a good way to make carbon-carbon bonds.
如果你要合成一个更复杂的有机分子,碳碳键是有机化学中,最难制造的键之一,而实际上氰离子是一种具有很高活性的分子,用它是一个好办法,尽管我们一会儿将看到它的一些缺点,但它的确是一个制造碳碳键的好方法。
He has criticized what he sees as the excessive American penchant for foreign military intervention and over-ambitious efforts to re-make other countries as western-style democracies.
VOA: standard.2009.03.27
"Today we are having a neighborhood community make-over.
VOA: standard.2010.05.14
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