translation.en: The services are called things like Spinvox, Phonetag -- this is the one I use -- Callwave. A lot of people say, "How are they doing this?
translation.zh: 这些服务包括有Spinvox, Phonetag - 这个是我在用的 - Callwave. 很多人说，“他们怎么这么做的啊？”