except when the car is running at 50 miles per hour and they pour all their money into it and they were wiped out.
只有在汽车以时速50公里前行时才管用,可他们把钱全投到了这个东西上,最后只得破产。
Your $30,000 down payment is completely wiped out because you were leveraged.
你支出的3万美元就彻底消失了,因为你的杠杆性
The Israelites won't be wiped out.
这样犹太人就不会灭绝了。
You can add something else to the answer without invalidating it, and that is anything with one power of t in it, because if you take one derivative it'll survive, but if you take two derivatives, it'll get wiped out.
你可以往答案后面加上其它东西,而且不影响结果,也就是任何t的一次项,因为你求一次导数之后它还在,但如果你求两次导数,这一项就不存在了
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