这些小符号不容易被注意到，但它们很重要。

These little symbols are not easy to be noticed, but are really important.

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注意只有全局导出的符号定义才是正式过程描述符。

Notice that the only symbol definition that is exported globally is the official procedure descriptor.

youdao

注意：为简单起见将省略传入的符号。

Notice that the incoming symbol is ignored for simplicity's sake.

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This then is the object of Saussure's attention as a linguist and as a semiotician.

这就是索绪尔所注意到的,作为一个符号学家兼语言学家。

耶鲁公开课 - 文学理论导论课程节选

You add them all up algebraically, keeping track of their sign, and that's the total force.

你再对这些力做代数加法,注意符号,就求出合力了

耶鲁公开课 - 基础物理课程节选

Convention, OK, this negative sign is just a pure convention. You just got to use it all the time. If you use an old textbook, written when I was taking thermodynamics, they have the opposite convention, and it's very confusing. But now we've all agreed on this convention, and work is going to be with the negative sign here.

系统对外界做功的符号为负,这就是我们,在本课中的规定，纯粹出于统一符号的需要，有些教科书中，可能会使用相反的符号规定,注意不要混淆了，这门课上,我们将一直使用。

麻省理工公开课 - 热力学与动力学课程节选