At that temperature, bulbs give off light we can see.
这种温度下，灯泡发出我们能看到的光。
Some of the things you see give off light of their own.
一些你看到的东西发出它们自己的光。
Most of the things you see are not giving off light of their own.
大多数你看到的东西是不会自己发光的。
Most of the things you see are not giving off light of their own.
大多数你看到的东西是不会自己发光的。
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