第二次时键入make all就可以了。

The second time around, typing make all worked.

youdao

trap命令防止用户在脚本执行时中断(例如，在引导时键入control - c)脚本。

The trap command prevents the script from being interrupted by the user (by pressing control-C during boot, for example) while the script executes.

youdao

再次键入2，以选择“a specific character”，然后在询问匹配哪个字符时键入t。

Type 2 again to select "a specific character" and then type t when asked which character to match.

youdao

So really, once we start writing more interesting programs, you would have to type out long annoying commands like that to just compile more sophisticated programs.

实际上，一旦我们开始写一些更复杂的程序时，你们可能要键入那样一些长的，讨厌的命令,来编译跟高级的程序。

哈佛公开课 - 计算机科学课程节选

And so this, in fact, when you say your computer stores information as zeros and ones, A you've just typed the capital letter A, that's all that's going on inside.

事实上，当你说电脑以这些0与1进行信息存储时，你已经键入了大写字母，那就是在计算机内部发生的过程。

哈佛公开课 - 计算机科学课程节选