先约, 已承担的义务previous: adj. 1.先,前;以前的 (opp. followi ...engagement: n. 1.约会,约定;约束,契约;预约。 2.婚约。 3 ...have a previous engagement: 有约在先have previous engagement: 已有约会be previous to: 之先下载手机词典可随时随地查词查翻译