... [prolonged illness] 长期患病 [an old illness] 经历时间很长、时犯时愈的病;宿疾 [(of a doctor)examine a patient]∶医生给病人治病 ...
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So, the process of developing a vaccine occurred over a long period of time.
疫苗的发展经历了很长一段时间
Because in doing that, Python would then have a value that it could pass on into some other part of a computation, and if it wasn't what I wanted, I might be a long ways downstream in the computation before I actually hit some result that makes no sense.
因为如果这样做的话,Python会将,输入的值传递到下面的,一些运算中去,如果这个值的类型不是我想要的,我可能会在得到,一个毫无意义的结果之前,经历一个很长时间的,计算过程。
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