Read Edit View history 二级头 èrjítóu second stage Origin Definitions Defs Strokes Stroke Words Sentences Sents created sense approved 二级头/二級頭 · èrjítóu · second stage 2026/03/04 二级头 / 二級頭 èrjítóu second stage second stage (scuba diving) 潜水前请检查二级头是否漏气。 noun created sense Mar 4, 2026, 02:25 AM