There are two people waiting outside.

有两个人正在外面等候。

《牛津词典》

OK. There will be a taxi waiting outside in 10 minutes.

好，10分钟后会有一部出租车在外面等候。

youdao

But is there any proof outside of anecdotal evidence that people actually don't like waiting and that page performance affects website users?

不过除了这些传闻以外，是否有切实的证据显示，用户不喜欢等待以及网页性能是否会影响到访客。

youdao

"At every new store opening, there would be a line of customers waiting outside, " says Sharma.

FORBES: Magazine Article

Emerging into the terminal is usually straightforward, though recently in Rwanda I was asked, with a winning smile, if I wouldn't mind waiting outside under an acacia tree while they stamped my passport as there were too many steps up into the terminal.

BBC: The perils of flying with a wheelchair

There appears to have been a line of reporters waiting outside his chambers every afternoon, notably Ken Auletta of The New Yorker, to whom he would spout off his various prejudices regarding Bill Gates and Microsoft.

FORBES: Microsoft Is Us