The mantle's motions, analogous to those in a pot of boiling water, cool the mantle by carrying hot material to the surface and returning cooler material to the depths.

地幔的运动类似于一壶沸水的运动，它把热的物质带到表面，再把较冷的物质带到深处，从而使地幔冷却。

youdao

My mother is cool—much cooler than most people.

我妈妈很酷，比大多数人都酷。

youdao

For cooler (blue or green) light, you'll tell the camera to warm things up, and in warm light, you'll tell it to cool down.

对于较冷的光源（蓝或绿色），你会让相机给照片增加暖色，而在暖光源下，你要让它给照片降温。

youdao

Sounds cool, but it would be cooler if you didn't have to wear a phone-size receiver, too.

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My fervent hope is that your exit from the ranks of the small and cool makes room for someone else even cooler.

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It needs cooler weather than its hardier cousins, but not too cool.

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