On the same machine, open a second login window.

在同一台计算机上，打开第二个登录窗口。

youdao

It's tough to find a window unit that's lighter than 46 pounds-and a machine like that would be able to cool only a fairly small room (150 square feet or less).

这很难找到一个窗口的机器重量轻于46磅，而这样的机器也只能够凉快相当小的房间(150平方英尺或以下)。

youdao

It's tough to find a window unit that's lighter than 46 pounds-and a machine like that would be able to cool only a fairly small room (150 square feet or less). What makes them so heavy?

这很难找到一个窗口的机器重量轻于46磅，而这样的机器也只能够凉快相当小的房间(150平方英尺或以下)。

youdao

In the other context, you know in a Window and a Windows machine, you close it with the X on the top right hand corner, where do you close it in the Mac?

还有一个就是，在Windows操作系统下,当你要关闭某个东西时，需要点击,右上角的“X“,那在Mac操作系统下呢？

哈佛公开课 - 计算机科学课程节选

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