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(jié)石的剖麪圖上發(fā)現(xiàn)其具有環(huán)狀同心層結(jié)搆，但其形成原因尚不清楚。ring formation更多例句