另外一个可以选择的比较廉价和较低效率的方式，是一个通过门缝塞入的信件来通知。
A less expensive but less effective alternative is a notice put through the letter-slot.
他用信件通知我。
他的办公桌上堆满着信件、备忘录和电话通知。
There was a pile of mail, memos and telephone messages on his desk.
他的办公桌上堆满着信件、备忘录和电话通知。
There was a pile of mail, memos and telephone messages on his desk.
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