Those scammers are the scum of the earth. Preying on the most vulnerable like that!

那帮骗子都是一群败类。专挑最易受害的人群下手！

Even the sinister bio-mimicry of the Preying Mantis, luring unsuspecting pollinators to their death, has a beautiful symmetry to it.

即使是邪恶的捕食螳螂，它用以引诱不知情者上钩的拟态，也是一个美丽的对称形态。

Bogus social workers have been preying on old people living alone.

冒牌社会福利工作员不断坑害独居老人。

I have a lot of problems preying on my mind.

我有许多困难困扰着我。

Next week's test has been preying on my mind.

下周的测验一直困扰着我。

I like preying on injurious insects in field.

我喜欢在田里捕食害虫。