外壳的英文可以翻译为：housing; shell; skin; hull; outer covering; carapace。
双语例句：
1、新型的轻质外壳使这种型号携带更轻便。The new light cover increases this model's portability.
2、生活在色彩之内：黄色。一艘黄色的小船外壳反射其在吃水线在魁北克的Forillon国家的公园。Life in Color: Yellow A yellow boat hull is reflected at the waterline in Quebec's Forillon National Park.
3、该方法基于Snake参数化变形模型，将真实物体可视外壳的计算问题转化为初始曲面在内外力作用下收敛于目标物体的问题。On the basis of snake deformable model, the algorithm translates the visual hull computation problem into a forces computation problem.
4、这辆汽车的外壳给人的感觉异常坚固。The solid feel of the car's shell is impressive.
5、有着相当坚韧外壳的深棕色豆类。Dark brown beans with a rather tough outer skin.
6、将甜椒剖成两半，在滚热的烤架上烤至外壳微焦。Halve the peppers and char the skins under a hot grill.
7、这款随身听的外壳是防水的。The personal stereo has a water-resistant outer case.
8、进入细胞后，病毒颗粒就打开它的外壳。On entry into a cell, the virus particle uncoats.