Hydrocarbons, with which fruit flies perfume themselves in species-specific blends, are known to be important in courtship, and apparently this assists flies that taste the hydrocarbons on prospective mates to distinguish their own species from that of others.
语法 Sentence Correction-4221
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正确的用户笔记
xiaobaitu 2016-02-20 15:20:20
this不能用于指代前句描述的事情
lyf0420 2015-12-04 16:36:37
语法--this 不能指前面描述的整件事;their own species from that of--that of 多余 注意species为单数
snow199511 2016-06-22 20:36:32
1. this不可以单独用作指代，与it, that作用不同，this + n. 2. that of others = redundancy
yiiiiiiiiii 2016-03-07 11:38:55
this不能指代前面整个句子 others已经可以包含其他的东西，不用再加that of
BobZ 2015-12-19 13:59:22
which、this不能用于指代前句描述的事情
