“pager”, “beeper”, “cellular phone”, “cell phone”, “mobile phone”分别什么意思?
Do you sometimes use them?
How do they compare with the standard telephone?
这两句什么意思?怎么回答呀?
“pager”与“beeper”, “cell phone”与“mobile phone”
都是呼机，都是手机，那他们之间有什么区别啊？