当你正在开车或在街上走时，拿起手机在键盘上打字不方便，甚至很危险。

When you're driving a car or walking down the street, it's not convenient or even dangerous to pick up your smartphone and type away on the keyboard.

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人们会在舞台上或在街上进行表演。

It is performed on stage or on the street.

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所以，我们在学校或在街上会看到这些同样的行为表现是不足为奇的。

And so it's no surprise when we see that behavior in our schools or on our streets.

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