parasite

例句：

1. One who frequents another's table; a hanger-on or parasite.
   食客經常到別人那兒吃飯的人; 食客或寄生者
2. A malarial parasite at the stage of development in which it inhabits bodily tissue before invading the red blood cells.
   潛隱體一種處於發育階段的瘧疾寄生蟲，在侵入紅血細胞之前，寄生在體內組織中
3. Don't give money to him; he is a parasite.
   別給他錢，他是個好吃懶做的人。
4. The mistletoe plant is a parasite on trees.
   槲寄生是寄生在樹上的植物。

字典網

英文解釋：

名詞 parasite:

1. an animal or plant that lives in or on a host (another animal or plant); it obtains nourishment from the host without benefiting or killing the host
2. a follower who hangs around a host (without benefit to the host) in hope of gain or advantage
   同義詞：leech, sponge, sponger