公共卫生运动侧重于预防和早期发现。

Public health campaigns focus on ___prevention and early detection.

邻里守望计划是预防犯罪的关键部分。

Neighborhood watch programs are a key part of crime ___prevention.

在许多情况下，预防比治疗更有效。

In many cases, ___prevention is more effective than cure.