我们的时间很多;用不着太急促。
最近销售上出的小问题用不着惊慌。
我相信你用不着我为你安排。
In fact you do not have to kill any animals for this kind of research because we do everything in a test tube.
其实,做这种研究,你根本用不着杀害任何动物,因为试验都是在试管中进行的。
Yeah, you probably don't need more than that.
对哦,可能你也用不着那么多车。
I want to do this carefully and slowly, and before I even start, let me point out in passing that calculus is not going to help us here.
我要慢点仔细讲这部分,在我开始之前,我需要说明微积分,在这里是用不着的
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