prey upon

基本解释

Large bugs in the Lethocerinae family have been known to prey upon small vertebrates including fish and frogs.
我们知道Lethocerinae科（半翅负子蝽科昆虫的一类）的大型昆虫会捕食包括鱼和蛙类在内的小型脊椎动物。
Baboons most often form close bonds with relatives, the researchers said, and the stability of those connections is partly a matter of luck since lions and leopards often prey upon baboons.
研究者表示，狒狒通常会与亲属建立亲密的关系，不过由于狮子和豹子的捕食，使得这种关系的稳定性含有一定的运气成分。
Within our own communities, those who seek to recruit and radicalize individuals will often try to prey upon isolation and alienation.
在我们国家，那些促使人激进的行动往往会受到孤立和疏远。

It seemed to me also that every living African, whether in good or ill health, is prey to many enemies of health that would interact one upon the other in many ways within one human body, Critics feared if President Mbeki appeared to doubt the link between HIV and the disease, people would not practice safe sex and use condoms.

Almost all of these guys are retail brokers dressed up and sent out into the world to prey upon pensions.
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Desperate people are willing to do almost anything when catastrophe strikes — and these scamsters prey upon them like buzzards.
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This open-ended or unlimited fee structure is common among broker-consultants at the large wirehouses who tend to prey upon smaller funds.
FORBES: Compelling Pension Consultant Disclosure (June 1, 2002 )