Mice with a scroll wheel as a middle mouse button are fairly popular, so support is being added.

用一个滚动轮作为鼠标中键的鼠标非常流行，所以增加了对它的支持。

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Hold down spacebar or the middle mouse button.

按住空格键或鼠标中键。

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Hold down spacebar or the middle mouse button.

按住空格键或鼠标中键。

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