File descriptors are low-level interfaces to input and output.

文件描述符是低层的输入和输出接口。

youdao

They are ultimately applied to the transformation of input data, which may be of low quality, into an output with a higher level of consistency and quality.

它们最终应用于输入数据的转换，这可能质量很低，得到具有较高一致性和质量的输出。

youdao

The user doesn't see all the low-level code executions to handle single or multiple commands but rather a very simplistic input, output, and error.

用户不会看到处理单个或多个命令的所有底层代码的执行情况，而是看到非常简单化的输入、输出和错误。

youdao

If you want to get some input from the user, my God I don't want to have to program it to low level zero and 1 just to get keys from the keyboard; please let there have been someone who does that for me and indeed there are an increasingly sophisticated options that you can pull off the shelf.

如果你想获得一些用户的输入数据，我的上帝,我可不希望在键盘上敲入0，1的低水平方式来编程;,希望有个人能帮我做这件事吧,但是现有的选择,也变得日益复杂了。

哈佛公开课 - 计算机科学课程节选