I felt ill at ease in such formal clothes.

我穿着这样正式的衣服觉得很拘谨。

He appeared embarrassed and ill at ease with the sustained applause that greeted him.

他对持久的掌声显得尴尬、不自在。

He always feels rather ill at ease before strangers.

他在陌生人面前总有些不自在。

She was ill at ease with strangers.

她跟陌生人在一起很不自在。

But now he was ill at ease about her.

可是现在他对她却感到局促不安。