A clear plastic bubble or shell covering part of an aircraft. 鑲有玻璃的座艙飛機上由透明的玻璃構成的透明圓罩或殼狀物
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(yú)類(lèi)的鰓或覆蓋在蛇或其它軟體動(dòng)物身上的角質(zhì)殼
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