当然我们不想不必要地惊吓人们，但他们应该被警示潜在危险。

Of course we don't want to alarm people ___unnecessarily, but they should be alerted to potential dangers.

社区应该理解不必要地使用私家车的影响。

The community should understand the effects of using private cars ___unnecessarily.

政府被指责将资金不必要地浪费在冗余项目上。

The government is accused of spending funds ___unnecessarily on redundant projects.