sinking operation中文,sinking operation的意思,sinking operation翻译及用法 2026-08-13 19:02 浏览次数 50 sinking operation英[ˈsiŋkiŋ ˌɔpəˈreiʃən]美[ˈsɪŋkɪŋ ˌɑpəˈreʃən]井筒掘进