But it usually hid a serious purpose.
但那些则往往隐藏着严肃的目的。
There is serious purpose to this question!
这个问题有严肃的目的！
Yes, it's a joke, he admits — but one with a serious purpose.
是的，这是一个笑话，他承认道——但是这有着一个严肃的目的。
In Iran, courting is more serious, and is performed strictly for the purpose of marriage.
在伊朗环球美联英语，提亲要更加严肃。提亲的目的很严格就是要成亲结婚。
I will argue that a line can be drawn and should be drawn to use gene transfer only for the treatment of serious disease, and not for any other purpose.
我认为我们可以而且是应该指定一条原则，以确保基因移植仅仅是用来治疗重病，而不会用于其他的一些目的。
I will argue that a line can be drawn and should be drawn to use gene transfer only for the treatment of serious disease, and not for any other purpose.
我认为我们可以而且是应该指定一条原则，以确保基因移植仅仅是用来治疗重病，而不会用于其他的一些目的。
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