1. I'll answer him back again if he tries to convince me by his argument.
如果他想用他的论点说服我，我就顶他回去。
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2. Until then it is no earthly good trying to convince him by rational argument.
迄今为止，企图用理性论证去说服他，丝毫没有用处。
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3. The argument fails to convince that other species will also decline, even assuming that this particular species of salamander is being harmed by UV radiation.
4. The argument fails to convince that other species will also decline, even assuming that this particular species of salamander is being harmed by UV radiation.
