您要查找的是不是：
- 致书一封send a letter
- 书letter
- 邮mail
- 指导书instructor
- 所致be caused by
- 平邮ordinary mail; surfime mail
- 报告书proces-verbal
- 授权书letter of attorney
- 北邮Beijing University of Post & Telecommunication
- 标书bidding documents
- 紧致compact; tightness
- 电子书e-book
- 回邮return mail
- 看书read a book
- 引致cause; lead to
- 宁静致远accomplish sth. Lasting by leading a quiet life; Keep cool and you'll win
- 承认书acknowledgment
- 平邮比空邮慢得多。Surface mail takes much longer than airmail.
- 致圣诞贺忱与最美好的祝福！Christmas greetings and best wishes!
- 邮区postal district
- 今日热词
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- 深远海浮式风电平台 - deep-sea floating wind power platform
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- 京雄高速公路 - Beijing-Xiongan expressway
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- 农业及相关产业增加值 - the added value of agriculture and related industries
