[求助]一道Prep SC解答

mika0404

PREP 破解2第150题中的正确选项E：

Hydrocarbons, with which fruit flies perfume themselves in species-specific blends, are known to be important in courtship, apparently assisting flies that taste the hydrocarbons on prospective mates in distinguishing their own species from others.

请教：本句末尾处为何不是in distinguishing their own species from that of others.???

这里为什么可以省略that of ？

amumu

不是省略that，而是压根就不能用that。因为others就是和前面的species比较了。

mika0404

我理解的是their own species 和species of others 间的比较？？？

hispeed

吃糖的目的是对种类进行判别