In the metaphorical sense, the shell might be a "carry-on" bag on wheels, stuffed full of cables, discs, dongles, batteries, plugs and paper documents (just in case of disc failure).

从比喻的角度来看，“壳”就是他们在汽车上背着的一个个包，堆的各种电线、光盘、数码密钥、电池、各种插头和纸面文件(以防光盘失效)。

youdao

And he gave a very good analogy in saying, "it was almost as incredible as if you'd fired a 15 inch shell at a piece of tissue paper, and it came back and hit you."

他还打过一个很好的比方：，“这就像是，你用个15英寸果壳，打到面巾纸上被弹回来打到你，一样不可思议。”

youdao

May: There are also some fine art crafts, including wood carving, shell ornaments and paper-cut.

阿美：那里还卖一些非常不错的工艺品，比如说木雕、贝壳饰品和剪纸。

youdao

And he gave a very good analogy in saying, "It was almost as incredible as if you'd fired a 15 inch shell at a piece of tissue paper, and it came back and hit you."

他还打过一个很好的比方：,“这就像是,你用个15英寸果壳,打到面巾纸上被弹回来打到你，一样不可思议，“

麻省理工公开课 - 化学原理课程节选

Inside it was a fire lantern, glowing gently through its paper shell.

ECONOMIST: Ray Bradbury

He got the seller, be it a Shell or Texaco, to carry most of the paper and then he'd use junk bonds to finance the rest.

FORBES: Magazine Article

It's split between two modes: an old-school one that works like the original right down to three buttons on the shell and an app mode that utilizes the touchscreen and allows users to play rock, paper, scissors with their pets.

NPR: Tamagotchi Returns: Electronic Pet Reborn As App