overheats
v.
使过热，变得过热( overheat的第三人称单数 );
例句:
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The core overheats and more of the water turns to steam.
来自BBC
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When a reactor has a "meltdown" it doesn't go boom like a bomb, it overheats.
来自SA
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Meltdown describes a phenomenon that occurs when the reactor's core, holding the fuel rods that drive nuclear fission, overheats.
来自THETIMES