circular plateexternal ringor outside ringouter beltouter raceouter ringouter shroud ringouter zoneperipheryshell外: outside; external side环: ring; hoop额外环: extra loop腹外环: abdominal external ring; annulus inguinalis aubcutaneus; external abdominal ring; subcutaneous inguinal ring外环道: bypass road下载手机词典可随时随地查词查翻译