2025-08-15 14:47:51 浏览次

perforation是什么意思 英[ˌpɜːfəˈreɪʃn] 美[ˌpɜːrfəˈreɪʃn] n. 穿孔, 孔眼, 贯穿, 贯通, 齿孔, 穿通[化] 穿透n. a line of small holes for tearing at a particular placen. a hole made in somethingn. the...