动词
中文翻译：Unknown
同义词：
['groan', 'murmur', 'grumble', 'mutter']
例句：
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3.
车辆等
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1.He grumbled about the long commute every morning.
他每天早上都抱怨通勤时间长。
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2. The driver grumbled as he drove through the heavy traffic.
司机开车经过拥堵时嘟囔着。
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3.The old man grumbled about his age and health.
老人抱怨他的年龄和健康状况。