doubling例句

He is doubling the parts of a preacher and a teacher.
他扮演传道人和教师两个角色.

You've then got an evens chance of doubling your money at a stroke.
然后你就有一半的机会可以把钱一下子翻一倍。

He's doubling the parts of a servant and a farm worker.
他既当仆人又做农工.

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