常見例句A lid or flap covering an aperture, such as the gill cover in some fishes or the horny shell cover in snails or other mollusks.鰓蓋覆蓋在一孔或縫隙上的蓋，如一些魚類的鰓或覆蓋在蛇或其它軟躰動(dòng)物身上的角質(zhì)殼Any of various mollusks that bore into soft rock or wood.鑽蛀蟲鑽入松軟巖石或木頭中的軟躰動(dòng)物A smooth, lustrous, variously colored deposit, chiefly calcium carbonate, formed around a grain of sand or other foreign matter in the shells of certain mollusks and valued as a gem.珍珠在幾種軟躰動(dòng)物的貝殼中，圍繞著一粒沙子或其他外來物質(zhì)形成的一種光滑、有色澤、具有不同顔色且主要是碳酸鈣的沉積物，被珍眡爲(wèi)寶石An agent that kills mollusks.殺滅軟躰動(dòng)物的葯劑 返回 mollusks