名词
中文翻译：贝尔
同义词：
['Bell', 'Bellman', "Bellman's algorithm"]
例句：
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1. The phone is ringing, but I can't answer it because of the heavy rain outside.
电话响了，但我因为外面的大雨听不清楚。
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2. The bell rang for us to come in.
铃响了，让我们进来。
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3. The bell was a warning that we were late.
铃响是一个警告，我们迟到了。