单词学习：outbox 名词/动词
outbox
/ˈaʊtbɒks/
发件箱；待发邮件文件夹；在拳击等运动中胜过对手
Mr. Gu reminded his students to check the outbox to confirm if the email had been sent successfully.
顾老师提醒他的学生们检查发件箱，以确认邮件是否已成功发送。
单词卡片
卡片已就绪
