基本解釋成環(huán);成環(huán)作用英漢例句雙語例句Researchers have found the ringed homocentric structures in the section of urinary stone, but the formation mechanism remains unclear.人們從尿結石的剖面圖上發(fā)現其具有環(huán)狀同心層結構,但其形成原因尚不清楚。ring formation更多例句