名词
中文翻译：Unknown
同义词：
['male horse', 'male donkey']
例句：
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1. The male mule is the only one that can carry heavy loads.
这头公骡是唯一能承载重物的。
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2. The male mule was used for transportation in ancient times.
在古代，公骡被用于运输。
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3. The male mule has a strong muscular build and is very useful for farming.
公骡肌肉发达，对农业非常有用。