- 在…的旁边；在场：
the cliff standing by the sea
海边的悬崖
There were two witnesses who happened to be standing by when the accident happened.
事故发生的时候恰好有两名目击者在场。
- 坐视不管，袖手旁观：
A man doesn't stand by and watch another insult him.
一个男子汉不会听任别人的侮辱。
- 做好随时出动的准备，处于待命状态：
My brother had gotten the upper hand in their fight, but I was kept standing by if necessary.
我弟弟在这场打斗中已占了上风，可我做好了随时冲上去的准备。
The troops are standing by tonight.
部队今晚处于戒备状态。
- 站在…的一边，支持(某人)：
I'll always stand by you through thick and thin.
在任何情况下我都站在你的一边。
He's my best friend, who stood by me when the going was hardest.
他是我最忠实的朋友，即使在情况十分艰难的时候他也会支持我的。
- 忠于；坚持(原则等)：
He has stood by his wife.
他一直忠实于他的妻子。
I will stand by what I said.
我一定会说到做到的。
- (发射台)准备发送信号；(接收机)处于调谐状态：
The transmitter, the operator said, has already stood by.
发报员说，发报机已做好了发放信号的准备。
- 搁置一旁：
The board meeting is over, isn't it My suggestion must have stood by.
董事会会议结束了吧，我的提议肯定给搁置了。