You stick this hook to the wall with a sucker. 你用吸盘把这个钩子固定在墙上。
The tiny fish, which cleans parasites from the bodies of larger fish, fights strong currents by anchoring itself with a sucker disc on its abdomen. 这些小鱼会清洁大鱼身体上的寄生虫，有时它们还互相打斗显示强壮，它们都有一个吸盘在其腹部以固定自己，然后开展清道夫样的工作。
