投递 deliver 投递信件 deliver letters; 无法投递的信 dead letter; 无法投递, 退回原处。 undeliverable, returned to sender.; 投递员 postman; letter carrier; mail carrier; mailman
由于地址字迹不清致使信件无法投递 it is impossible to deliver this letter because the address is illegible
信件 letter; mail; missive 打印信件 a form letter; 商业信件 business letter; 发出的信件 an outgoing letter; 友好的信件 a friendly letter; 他每天有大量的信件要回复。 he has a large amount of mail to answer every day