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1·His mouth tightened into a thin line.

他的嘴抿成了一道细缝。《牛津词典》

2·Her lips compressed into a thin line.

她的双唇抿成了一道缝。《牛津词典》

3·Her stare was malevolent, her mouth a thin line.

她目光狠毒，嘴唇紧闭。《柯林斯英汉双解大词典》

4·The thin line shows you where the bird flew.

薄线显示你在哪儿鸟飞行。

5·It is a thin line between winning and losing.

胜败只是一线之间的事情。

6·A thin line just on the top eyelid will do the trick.

上眼睑的一条细线就可以获得成功了。

7·That's the thin line between success and failure.

成功与失败，只有一线之悬。

8·No, There is not a thin line between love and hate.

不，爱恨之间并不是一线之隔。

9·A real man knows the thin line between confident and cocky.

一个真正的男子汉会明了自信和自负的界线。

10·His mouth was compressed into a thin line of concentration.

他的嘴抿成了一条线，显得很专注。