That so-called return envelope may not have been stamped by the sender, and a hard-pressed office manager may be reluctant to send off long letters of explanation to disappointed job-hunters.

• 所谓的退回信封，退还方可以不贴邮票。 被催得很紧的办公室经理会不情愿给那些失望的求职者寄发很长的解释信。