2019-5-11经济学人泛读

1.(Doing) sth is a must.

Warm clothes are a must in the mountains.

2.preserve

sth that is only suitable or allowed for a particular group of people.

America used to be the land of opportunity and optimism. Now opportunity is seen as the preserve of the elite.

3.be worth (doing) sth

值得做某事

The small town is worth visiting.(be worth doing)

The small town is worth a visit.(be worth sth)

I think it to be a shame.
I think that it is a shame.
I think it is a shame.
I think it a shame.
They may think it to be worth sacrificing A for B.
They may think that it is worth sacrificing A for B.
They may think it is worth sacrificing A for B.
They may think it worth sacrificing A for B.

4.drawback

disadvantage, downside, pitfall, flaw,weakness, problem.

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