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set in vi.: 开始

Winter has set in early this year.

Fatigue sets in when one grows old.

scavenger n.: 食腐动物

metaphorically :比喻

dustman 清道夫，清洁工 obscene writer

vegetarian: 吃素的

He is a vegetable. (乏味之人)

carnivorous: 吃肉的

numerous a. :许多的(数量多)

numeric :（about number）关于数字的

numbered a. : 注册,编号的 时日无多的

mouse: n.:老鼠