“您没有 Windows 安装光盘，女士，因为您不需要它。”他高兴地解释道。

"You don't have the Windows Setup CD, ma'am, because you don't need it," he explained cheerfully.

youdao

缺少了文件名，因为 find 为每个文件调用 grep 一次，而 grep 非常智能，能够知道您是不是仅提供文件名，您不需要它告诉您是哪个文件。

The file name is missing because find called grep once for each file, and grep is smart enough to know that if you only give it one file name, then you don't need it to tell you what file it was.

youdao

这时产品对象已经被转换成为了正确的类，所以您不需要自己再次的转换它。

This was already cast as the correct class of product object, so you do not need to cast it yourself.

youdao