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1. life expectancy 預(yù)期壽命，平均壽命
2. get out of hand 失控
3. be fed up with 感到厭煩；討厭；對……感到厭煩；厭煩
4. 某人對某事不熟悉的兩種表達
sb. is unfamiliar with sth.
sth. is unfamiliar to sb.
5. come down with sth. 生病
6. boil down to sth. 歸結(jié)為
7. frown on sth. 不悅；蹙眉不悅；對……不贊成；不贊成某事
8. do nothing but do 固定用法
9. in honor of sb./sth. 紀念某人/某事
10. There’s no point in doing sth. 做某事無意義
11. nothing but 只有；只不過 anything but 根本不；除…以外任何事
12. rarely, seldom, hardly, scarcely
Rarely和seldom意思都是“很少”（表頻率），seldom更正式、更書面。
Hardly和scarcely意思都是“幾乎不”或者“剛剛”（表程度）。相比之下scarcely更正式、更書面。
People rarely ask questions.
She was seldom seen in public.
I hardly had time to ask her name.
We had scarcely arrived when he asked us to leave.