Is there anything I can do for you? ; What would you ask of me? ; Do you need me for something?
如果你需要我做什么，尽管告诉我。
If you need me to do, let me know.
youdao
你需要我做什么呢?。
What do you need me to do?
你需要我做什么呢？
It is true mathematically, you can add two numbers, but you've got to ask yourself,"What am I doing as a physicist when I add these two numbers?"
在数学上它是正确的,你可以引入这两个常数,但是你需要问问自己,当我引入这两个常数时,这么做有什么物理意义
耶鲁公开课 - 基础物理课程节选
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