I have to reject the notion that greed can be a good thing.
我不能接受那种认为贪欲也可以是件好事的想法。
Nursing can be a very rewarding career.
做护士可以是非常有意义的职业。
Children can be difficult as we know only too well.
小孩子往往很难对付，对此我们都非常清楚。
This tool can be used in a variety of ways.
这一工具有多种用途。
The results can be divided into three main categories.
结果可分为三大类。
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