信英语怎么说
1.letter 2.mail 3.message 4.word信 [xìn] <名>letter ； mail ； message ； word <动>believe ； take stock in ； at will ； at random <形>（确实） true 网 络 letter； faith； cover letter； believe
私信用英语怎么说
私信
[词典] private letter; personal letter;
[例句]当你的联系人接受邀请后，你就可以同他私信或群聊了。
Once your people start turning up, you can chat with them privately or form groups.
写信英语怎么说
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