也许您一直都不输出pdf文件。

OK - you probably don't output to a PDF file all the time.

youdao

这是一个需要输入但是不输出任何东西的操作。

This is an operation that requires an input but does not output anything.

youdao

链接器的指令不输出这一段。

An instruction to the linker to not output the section.

youdao

You put some inputs in, it has a contract that says if you put the right kind of inputs in you'll get a specific output coming out, but you don't have to know what's inside of that box.

你可以将输入一些内容,它相当于一个条件合约,如果你的输入是正确的，你就能得到特定的输出,但是你不知道盒子里面有些什么。

麻省理工公开课 - 计算机科学及编程导论课程节选

And, sad to say, at least one of our tests produced an output that we were unhappy with.

很不幸的是，至少一个测试输出我们,是不满意的，它花费了太长时间。

麻省理工公开课 - 计算机科学及编程导论课程节选

But it turns out that because the Standard I/O Library is -lstdio so common they don't force people to type this all day long because it's just so commonly used.

由于大家都会用到标准输入输出库,因此我们不要求每次都在后面添上,可以省略。

哈佛公开课 - 计算机科学课程节选