He said the security forces would continue to crack down hard on the protestors.

他说安全部队将继续严厉镇压抗议者。

Officers will crack down on lunatic motorists who speed or drive too close to the car in front.

警官们将严惩那些超速行驶或与前面车辆追尾的疯狂驾车者。

Why crack down now?

为什么是现在打击？

He pledged to crack down on rising crime.

他承诺将严厉打击犯罪上升。