手机套的英文：
cellphone cover
cellphone case
cellphone sock

cellphone是什么意思：
n. 手机

[Informal] a cellphone; a cellular phone
大哥大

The pink cellphone is adorable.
那个粉色手机很可爱。

My cellphone battery has given out.
我手机没电了。

cover是什么意思：
v. 遮盖；掩饰；包含；采访；给...保险；顶替
n.. 遮盖物；封面；掩护；保险；借口；餐具

Cover as if with a shroud.
仿佛用覆盖物掩饰着。

To be covered with or as if with fog.
为雾笼罩被或好象被烟雾掩盖

Covering: The fixing of a book cover to the spine and end papers .
上书皮:把书皮粘贴于书和纸上。

sock是什么意思：
n. 短袜，鞋的衬底；一击
v. 重击，猛投，给…穿袜；存钱

He wore unmatched socks.
他穿了左右不成对的袜子。

There is a hole in my sock.
我的袜子上有个洞。

Give him a sock on the jaw!
给他下巴上来一拳！