You stick this hook to the wall with a sucker. 你用吸盤把這個鉤子固定在牆上。
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. 這些小魚會清潔大魚身體上的寄生蟲,有時它們還互相打鬥顯示強壯,它們都有一個吸盤在其腹部以固定自己,然後開展清道夫樣的工作。