Speed of response, right, so I actually do tend to respond to some people's emails more quickly than others and that in fact might be a useful indicator.
回复的速度,是的,我可能对某些人的邮件,回复的速度更快一些,而事实上它可能是个有益的暗示。
Memory cells are long lasting cells that remember this exposure and can respond very quickly on second exposure.
记忆细胞可以长时间记忆与抗原的接触,并在再次免疫中迅速做出应答
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