确定出您所知道的危险值仍不失为一个好主意：您可以用它们(在头脑中)检查您的确认例程。
It's still a good idea to identify values you know are dangerous: you can use them to (mentally) check your validation routines.
生活中的操作从来不需要确认：当你旋转钥匙的时候，汽车不会问你：“你真的确定想要启动引擎么？”
Other operations in life don't require confirmation. Your car does not ask, "do you really want to start the engine?" when you turn the key.
根据威特莫尔教授的话，尽力地去确定最早的鸟类还没有得到半点的确认，但新的发现能飞速地改变前景。
According to Prof Witmer, little is certain in trying to determine the earliest bird and new findings can rapidly change perspectives.
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