Blood donation does more good than harm, so it should be encouraged under scientific instructions.

献血利大于弊，因此应该在科学指导下鼓励人们献血。

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People are often investing money and hope in something that could be doing more harm than good.

人们常会盲目地花钱，并把希望寄托在一些实际上弊大于利的事物上。

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Parents who buy children a computer to help with schoolwork could be doing more harm than good.

家长给孩子买电脑来完成家庭作业可能是弊大于利的。

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In addition, the studies published this week suggest that granting exclusive rights over genes may be doing more harm than good.

ECONOMIST: Patenting genes is bad for diagnosis

So Fannie and Freddie may be doing more harm than good.

ECONOMIST: Homesick blues

Governments must be able to show that they are doing everything that is reasonable to protect citizens from threats, but they must be candid in admitting that not all risks can be eliminated without doing more harm than good and eroding the very values they are seeking to defend.

ECONOMIST: Weighing safety against liberty