plummets
v.
垂直落下，骤然跌落( plummet的第三人称单数 );
例句:
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Ultimately, body temperature plummets and the baby turns ashen.
来自NEWYORKER
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As a result, blood sugar plummets, sometimes even going below the baseline.
结果, 血糖浓度迅速掉落, 有时甚至落于基线之下.
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State and local governments could continue to back as tax revenue plummets.
由于税收的直线下降,州和地方政府可能继续削减支出.
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If this happens, the value of the semi - precious stones plummets.
如果发生这种情形, 半宝石的价值就一落千丈.
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Meanwhile the chance of having a healthy child plummets.
来自SA
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Lake Malawi plummets into permanent darkness beyond the reach of human divers.
来自BBC