That is why commerce and labor must be regulated to some degree.
这就是为什么商业和劳动必须在某些程度上关联在一起。
To ensure normal running of the pipeline, the flow rate must be regulated.
为了保证管道正常地运行,必须对流量进行调节。
To fairly match organs with recipients, organ allocation must be regulated.
为了使器官与受体完全匹配,必须对器官的分配进行控制。
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