centering ring裂口: stomium; chop; cleft; split ...圈: circle; ring定心环 裂口圈: centeringring口圈: ring of ports裂口: stomium; chop; cleft; split head; rima (pl. rimae); rip; breach; gap; vent下载手机词典可随时随地查词查翻译关注微信公众号：chachacidian，回复:裂口圈，即可在微信中查询翻译
