政府已投入大量资金用于预防项目，以应对不断上升的犯罪率。

The government has invested heavily in ___prevention programmes to tackle the rising crime rates.

疫苗接种是预防许多严重疾病的关键策略。

Vaccination is a key strategy for the ___prevention of many serious diseases.

在许多情况下，预防比事后试图解决问题更有效且成本更低。

In many cases, ___prevention is more effective and less costly than trying to fix a problem later.