These expressions are often used interchangeably, but they do have different meanings.

这些表达法经常可以互换使用，但它们的确有不同的含义。

《柯林斯英汉双解大词典》

You have a little time to do research, prepare technical expressions and so on.

你会有一些时间来做调查、准备技术用语等等。

youdao

Do not use these annoying expressions!

不要用此类冒犯的表达。

youdao

Other expressions that mean boss or employer have nothing to do with brass or hats.

VOA: special.2011.05.08

What I have now is the following: I can write expressions, do combinations of things to get out values, I can store them away, I can print them up.

我已经讲过如下内容：,如何写表达式，如果把东西混合然后得到结果值，我可以将其保存，也可以将其显示。

麻省理工公开课 - 计算机科学及编程导论课程节选

We have to describe how do you put together legally formed expressions. OK?

我们需要对你怎么把写好的表达式,合理的放在一起进行描述，对不对？

麻省理工公开课 - 计算机科学及编程导论课程节选

"Words do not describe it but the expressions and the emotions that have been shown certainly do, " Kirtley said.

BBC: They've all stood up and done it when it counted

Expressions of Interest do not constitute a commitment to making an application but enables the UKNC to plan the process to provide timely support.

UNESCO: Apply to join the UNESCO Creative Cities Network

We do not only analyze emotional expressions but also measure eye tracking, behavior, facial recognition, attention time, head pose, and even more in the near future.

FORBES: Welcome to The Future: BlueBubbleLab and The Market Research of Tomorrow