他兼任多家杂志的编辑，但仍难以支撑日常生活。

He worked as an editor for many magazines, but just barely supported himself.

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证券公司的董事、监事、经理和业务人员不得在其他证券公司中兼任职务。

Members of the board of directors, members of the board of supervisors, managers, and employees of a securities company are not allowed to take up concurrent posts at other securities companies.

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另外，他兼任船上的外科医生以及船员们的牧师。

Among his other duties, he acted both as the ship's surgeon and as chaplain for the men.

《柯林斯英汉双解大词典》