I thought it was unethical for doctors to operate upon their families.
我认为让医生给他们的家人动手术是不道德的。
You also need some XML to operate upon.
还需要一些供操作的XML。
A computer that is designed to operate upon a restricted class of problems.
为解决有限类型问题而专门设计的一种计算机。
A computer that is designed to operate upon a restricted class of problems.
为解决有限类型问题而专门设计的一种计算机。
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