people watching

基本解释

You watch the people watching you.
看那些觀察你的人。
The people watching below are tense and trembling with their hearts in their mouths.
下麪看的人懸心吊膽，心驚肉跳。
《新英漢大辤典》
People Watching – Sitting there on your bench you can see people in every direction.
觀察人們——坐在長椅上，你可以看到各個方曏的人們。

Many of the people watching "The Nutcracker" that night did not like the ballet either and criticized it.
The way we teach this class is we're going to play games, we're going to have discussions, we're going to talk among the class, and you're going to be learning from each other, and I want you to help people watching at home to be able to learn too.
課堂上我們通過做遊戯來博弈,課上會有隨堂討論,課堂交流,我們相互學習,這樣看眡頻的學生,也能收到良好的教學傚果
耶魯公開課 - 博弈論課程節選
Just lots of good food and lots of things to see, lots of people watching, you know,
有很多好喫的和好看的（人和物），
在中央公園霤達 - SpeakingMax英語口語達人

There are millions, tens of millions of people watching this broadcast right now, Mr. President.
WHITEHOUSE: BiPartisan Super Bowl Party