parasite

US /ˈper.ə.saɪt/
UK /ˈper.ə.saɪt/
"parasite" picture
1.

寄生虫, 寄生生物

an organism that lives in or on an organism of another species (its host) and benefits by deriving nutrients at the other's expense

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Fleas are common parasites found on dogs and cats.
跳蚤是狗和猫身上常见的寄生虫。
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Some fungi act as parasites on plants, causing diseases.
有些真菌作为植物的寄生虫，引起疾病。
:
leechsymbiont
2.

寄生虫, 白吃白喝的人

a person who habitually relies on or exploits others and gives nothing in return

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He's a real parasite, always living off his parents' money.
他真是个寄生虫，总是靠父母的钱生活。
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The community tried to get rid of the social parasites who contributed nothing.
社区试图摆脱那些毫无贡献的社会寄生虫。
:
freeloaderspongescroungerleechhanger-on