英文原文：
climb mountains.
mountain climbing
英式音标：
[klaɪm] [ˈmaʊntns] .
[ˈmaʊntɪn] [ˈklaɪmɪŋ]
美式音标：
[klaɪm] [ˈmaʊntns] .
[ˈmaʊntn] [ˈklaɪmɪŋ]
英文原文：
climb mountains.
mountain climbing
英式音标：
[klaɪm] [ˈmaʊntns] .
[ˈmaʊntɪn] [ˈklaɪmɪŋ]
美式音标：
[klaɪm] [ˈmaʊntns] .
[ˈmaʊntn] [ˈklaɪmɪŋ]