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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
- protective cover of vegetation 植被防护层,防护性植被
- 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 path leads to a hill bare of vegetation. 这条小道通向一座没有草木的小山。
- 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
- percent ground cover of vegetation 地面覆盖度
- The land was denuded of vegetation. 这块土地曾是不毛之地。
- 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。
- 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 soldiers crept forward under cover of darkness. 士兵在夜色的掩护下匍匐前进。
- 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 hot sun had warped the cover of the book. 太阳把这本书的书皮晒弯了。
- 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
- The earth bore a thick green mantle of vegetation. 大地覆盖着一层厚厚的绿色植物。
- The criminal escaped under the cover of darkness. 犯人趁着天黑逃跑了。
