He died poor, and left no personal effects.
他死时一贫如洗，没留下什么私人财产。
If the left expression to comma-operator has no side effects, the compiler might omit code generation for the expression.
如果逗号运算符左侧的表达式没有任何副作用，则编译器可能不再生成该表达式的代码。
Once patients left the study, there was no way for researchers to control what drugs they took, and those medicines may have neutralized the beneficial effects of the study drugs.
一旦患者左研究中，却没有办法，为科研人员控制哪些药物了，这些药物可能有瓦解的有利影响，研究药物。
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