犍子;牯;
An ox is a castrated bull.
阉牛是经过阉割的公牛。
A bullock is a castrated bull.
阉牛是去势的公牛.
Among cattle, a bull is a male cow that has not been castrated.
在各种牛中,bull指的是没有阉割过的雄性牛。
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