Troops were sent in, ostensibly to protect the civilian population.

谎称为保护平民而派驻了军队。

The civilian population was suffering greatly at the hands of the security forces.

这些平民在保安部队的手中吃尽了苦头。

The bombing murdered most of the civilian population.

轰炸炸死了大部分的平民百姓。

That outbreak did not spread to the civilian population.

那一次的爆发没有传播到普通民众。