vicious

We need to break the vicious cycle of violence and counterviolence.

我们需要结束暴力和反暴力的恶性循环。

It is a deliberate, nasty and vicious attack on a young man´s character.

这是对一位青年的人格蓄意的、下流的和恶毒的攻击。

Their loss was partly due to a vicious price war between manufacturers that has cut margins to the bone.

他们的亏损部分是因为制造商之间把利润空间削减到了极点的一场恶性价格战。

The more pesticides are used, the more resistant the insects become so the more pesticides have to be used. It´s a vicious circle.

杀虫剂使用得越多，那些昆虫的抵抗力越强，因此就要使用更多的杀虫剂。这是一个恶性循环。

Such a vicious lie could be nothing but a stab in the back.

这样一种恶毒的谎言简直是暗箭伤人。