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- A protective covering of bony plates or scales. 护身甲壳保护骨盘或介壳的覆盖层
- The cap is a protective covering of a plant. 藓帽是一种植物的保护帽。
- They have a protective cover of bracts and scales from time of intiation. 从开始孕育时，花芽便具有一层由苞片和鳞片构成的保护层。
- They have a protective cover of bracts and scales from time of initiation. 从开始孕育时,花芽便具有一层由苞片和鳞片构成的保护层。
- The front cover of the novel has been torn off. 这本小说的封面已被撕掉。
- The protective covering of certain animals,as the shell of a turtle. 甲壳某些动物身上有保护作用的覆盖物，例如乌龟的壳。
- The protective covering of certain animals, as the shell of a turtle. 甲壳某些动物身上有保护作用的覆盖物，例如乌龟的壳
- I can't make the cover of the tin fit on. 我无法把这罐头的盖子盖上。
- Crimes committed under cover of patriotism. 打著爱国的旗号犯下的罪行。
- The soldiers crept forward under cover of darkness. 士兵在夜色的掩护下匍匐前进。
- A protective covering of half-rotten vegetable matter spread to reduce evaporation and soil erosion. 盖在半腐烂的植物上面减少蒸发和土壤侵蚀的一层遮盖物。
- The hot sun had warped the cover of the book. 太阳把这本书的书皮晒弯了。
- Testa The hard dry protective covering of a seed, formed from the integuments of the ovule. 外种皮：覆盖在种子外部的坚硬干燥的保护层，由胚珠的珠被发育形成。
- The criminal escaped under the cover of darkness. 犯人趁着天黑逃跑了。
- The noncellular,hardened or membranous protective covering of many invertebrates,such as the transparent membrane that covers annelids. 护膜许多非脊椎动物的非细胞的、硬化或膜状的保护性覆盖层，如覆盖节肢动物的透明膜状物
- We travelled under cover of darkness. 我们在夜幕掩护下行进。
- The noncellular, hardened or membranous protective covering of many invertebrates, such as the transparent membrane that covers annelids. 护膜许多非脊椎动物的非细胞的、硬化或膜状的保护性覆盖层，如覆盖节肢动物的透明膜状物
- The pretty girl on the cover of the book is just a sales gimmick. 书封面上印上美女不过是吸引顾客的一种生意眼。
- A leading guess is a combination of geothermal heat, large doses of salt (which lowered the freezing temperature) and a protective covering of ice. 最有可能的猜测，综合了地热、大量盐类（降低冰点）以及一层具保护性的冰层。
- Write your name on the front cover of the exercise book. 在练习簿的封面上写上你的名字。
