ifs international freephone service 国际免费电话；国际免费德律风
universal international freephone numbers 通用国际免费电话号码
universal international freephone number 国际通用免费电话号码
英语例句库
Whenever possible "Freephone" or similar facilities should be provided so that Respondents can check the Researcher's bona fides without cost to themselves. 无论何时,尽可能提供"免费电话"或类似的设备,让被访者应免费查到研究人员的真实性.
A toll-free telephone number or freephone number is a telephone number that is billed for all arriving calls instead of incurring charges to the originating telephone subscriber. For the calling party, a call to a toll-free number from a landline is free of charge.