形容词
中文翻译：零下
同义词：
['absolutely', 'completely', 'utterly', 'extremely', 'exceptionally']
例句：
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1. The temperature dropped to subzero levelslast night.
昨晚温度降到了零下。
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2.The ice was so thick that it feltlike being in a subzero environment.
冰太厚了，感觉像是在极冷的环境中。
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3. The scientist conducted experiments at subzero temperatures.
科学家在极冷的温度下进行实验。