太阳西边出
letter:a written or printed message that is usually put in an envelope and sent by mail 信，信件letter是作“信，信件”是可数名词，通常与动词post，mail,read,receive,send,,write搭配，也就是说写信write a letter寄信post/mail/send a letter收到信receive/get a letter阅读信read a letter
优质英语培训问答知识库
