Turn the burner off once the milk is boiling, but leave the saucepan on the element or gas grate.

当牛奶煮沸时把火关掉，但不需要把平底锅移开。

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As the star begins to run out of fuel, its core becomes smaller and hotter, boiling off its outer layers.

当恒星逐渐缺少能源，它的核心部分变得越来越小，温度逐渐升高，同时使外层物质挥发。

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Condense the mixture by boiling off some of the liquid.

通过煮沸，蒸发掉一些液体，使混合液浓缩。

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The game was always close to boiling over, and Lukas Podolski went down after an off-the-ball clash with Rene Aufhauser, then went eyeball to eyeball with Emanuel Pogatetz.

CNN: Ballack thunderbolt puts Germany through