on phone 与on the phone的区别是什么?

on phone 与on the phone的区别是什么? by phone 与 on the phone she is on the phone,为什么不用she is talking on the phone,区别是什么, on the phone的同义词 want on the phone? on/by the phone 翻译:"on the phone." on the phone on the phone造句 如何区别on phone和by phone? over the phone/through the phone/ on the phone 请问有什么区别? call on the phone和make a call的区别