When you type in the if statement and the terminating colon, then press Return (or enter) on your keyboard, the Python interpreter realizes you have entered a compound statement.

当键入if语句和终止的冒号，并按键盘上的回车键时，Python解释器就知道您输入了一个复合语句。

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Or you can use the space bar or the left and right arrow keys to move the highlight, and then press the return key.

或者使用空格键或左右箭头移动高亮显示的选项，并按回车键。

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Following that meeting, President Obama will have a press conference, and then we will return home here to Washington late that night.

WHITEHOUSE: Press Briefing