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And it mainly includes the action of 1,3-diethylene alkylation and acidyl; the action of addition of carbonyl compound; the action of chlorortrimethys:lane and the reaction of diethy lene.

对负离子─—1，3-二噻烷的合成方法及其在有机合成上的用进行比较系统的介绍，主要介绍1，3-二噻烷的烃基基反，与羰基合物的加成反，与氯三甲硅的反及1，3-二噻烷的还原反。

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3G, 401(K), a,

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剑桥力全真试题 9

This is dealt with organically - it's purified by being filtered through reed beds which have been planted for that purpose in the garden.

这是有机化处理，它过芦苇地被净化了，这就是在花它们的用途。

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low-key, low-keyed, lowland, lowlander, Lowlands, low-level, lowlife, lowlihead, lowliness, low-loader,

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3G, 401(K), a,
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