boundary; frontier; border; borderline; edge range line; periphery 短语和例子标定边界 demarcate boundaries; 划定边界 delimit boundaries; 驻守边界 garrison the border; 越过边界 cross a boundary; cross the border a边界: a-margin边界,边界线: boundary nounpn边界: pn boundary边界,边框: boundary边界;界面: boundary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:边界,即可在微信中查询翻译