做另一件事的同時(悄悄)注意
have one eye / half an eye on sth
做另一件事的同時(悄悄)注意
to look at or watch sth while doing sth else, especially in a secret way so that other people do not notice
During his talk, most of the delegates had one eye on the clock.他講話時大部分代表邊聽邊悄悄看鐘。
釋義來自《牛津高階英漢雙解詞典》第 9 版