| 单词 | 外包 |
| 释义 | 〔epiboly〕The growth of a rapidly dividing group of cells around a more slowly dividing group of cells, as in the formation of a gastrula.外包：在胚胎的形成中，一部分分裂快的细胞的生长包围另一部分生长慢的细胞〔hickory〕Any of several chiefly North American deciduous trees of the genusCarya, having smooth or shaggy bark, compound leaves, and hard smooth stones or nuts, each containing an edible seed and surrounded by a husk that splits into four valves. 山核桃：一种山核桃 属的北美洲落叶乔木，树皮光滑或粗糙，复叶，果实或坚果坚硬光滑，中间有可食用的种子，种子外包了一层可裂成四片的外皮 〔rissole〕A small, pastry-enclosed croquette of a minced meat or fish, usually fried in deep fat.炸肉（鱼）饼，炸肉（鱼）圆：一种小的、外包有面糊的肉馅或鱼肉馅炸丸子，常在深油中炸〔Rome〕A variety of apple having round firm fruit with tough red skin.罗米苹果：苹果的一种，结实的圆形果实外包有坚韧的红色果皮〔periostracum〕The hard chitinous outer covering of the shell of many mollusks, especially freshwater ones, that protects the shell from the erosive action of water.角质层：许多软体动物，尤指淡水软体动物身体硬壳外包的一层物质，用以防止壳受水的侵蚀作用 |
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