However, after a few hours of study you will manage to know enough to save other people's lives.
然而，经过几小时的学习后，你就能懂得挽救生命所必需的知识了。
However, after a few hours of study you will manage to know enough to save other people's lives.
然而，经过几个小时的学习，你就能学会救命的方法。
After a few hours of study you will manage to know enough to save other people's lives.
经过几个小时的学习，你就能知道足够的救人常识。
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