plural in-boxes
plural in-boxes
Learner's definition of IN-BOX
[count]
1
US : a box or other container on a desk in which letters, notes, etc., that are sent to the desk are placed(办公桌上的)收件盒 — called also (British) in tray
— see picture at office; compare out-box 2
computers : a computer folder that holds new e-mail messages(计算机电子邮件的)收件箱