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 is quite at ease in public.

他在公众场合十分自在。

And people felt at ease in his presence.

只要有他在场人们都感到愉快。

I don't feel at ease in the strange place.

在这个陌生的地方，我觉得很不自在。

She feels ill at ease in strange surroundings.

她在陌生的环境中感觉不自在。