sinking operation中文,sinking operation的意思,sinking operation翻译及用法 2026-06-27 05:53 浏览次数 45 sinking operation英[ˈsiŋkiŋ ˌɔpəˈreiʃən]美[ˈsɪŋkɪŋ ˌɑpəˈreʃən]井筒掘进