expression是什么意思？

expression n. 表达, 表情, 脸色, 声调, 腔调, 榨出, 语法, 措辞

"Shut up" is not a polite expression.

"住口"不是有礼貌的话。

There was no expression on her face.

她脸上毫无表情。

I sent them flowers as an expression of thanks.

我给他们送去鲜花表示感谢。

the free expression of ideas

自由发表意见

His expression changed to one of deep concern.

他的表情转变为严肃的沉思。