The next question is why the glass casing surrounding an electric light might be compared to an onion.

下一个问题就是，为什么人们会将电光外的玻璃罩类比成洋葱？

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Set in a casing pipe cutting, equipment, light and practical.

集套管切管于一身，装备轻便实用。

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The utility model discloses an apparatus for fixing and displaying, which combines the light and the sugar displaying, and comprises a front casing, a back casing and a hoop.

本实用新型公开了一种将光与糖果展示结合起来的固定和展示的器具。

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On May 20, investigators who had been casing the area noticed a light upstairs in the otherwise dark warehouse in Long Island City.

WSJ: NYPD: Merchant held for ransom, tortured for month

Whereas tablet PCs are full-blown PCs that contain all their components inside the casing of a notebook-sized flat-screen display, smart displays are light, portable display screens that connect wirelessly to a PC, so a user can interact with the PC away from the desk for reading documents or surfing the Web.

FORBES: Amid Gloom, Gates Envisions Another Boom

More than just supplying a battery-free source of light, though, the lantern can function as a charger, thanks to a USB port built into the casing.

ENGADGET: Green House's lantern runs on salt and water, powers your gadgets via USB