第一条定义是动词go和介词ahead的简单搭配，算不上短语。
该介词短语中的从句 where man…rewarding 是修饰areas的定语从句。 该从句由两个并列的句子构成，即 manlives 和 agriculture is rewarding。
Furthermore sun drying can not be practiced widely due to unfavorable weather conditions in many areas where man 1ives and agriculture is rewarding．
（介词短语）汽车旁边的那个人是我叔叔。
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