They have found that two oxen yoked together can actually do double the work of two oxen individually.

两只牛同负一轭，可以完成的工作是他们分别单独工作的两倍。

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They have found that two oxen yoked together can actually do double the work of two oxen individually.

两只牛同负一轭，可以完成的工作是他们分别单独工作的两倍。

youdao