证明信的英文怎么说

证明信的英文：

【经】 letter of reference

letter是什么意思：

n. 字母；信；字面意义；证书，许可证；文学

v. 用字母标明，写字母于；写印刷体字母；赢得校名缩写字母标志

in letter and in spirit

在字面意义和精神实质上|无论形式和实际 The letter was a forgery.

这封信是伪造的。Post the letter through the slit in the letter box.

把这封信从信箱的投信口投进去。 Imprint a postmark on a letter =imprint a letter with a postmark

盖邮戳于信上The letter is directed to him.

这封信是写给他的。reference是什么意思：

n. 提到，谈及；参考，查阅；证明人，介绍信

v. 查阅；参考；给（书）等附参考资料

The headmaster supplied him with a reference.

校长给他提供证明人。You can refer to a dictionary if necessary.

如果有必要，你可以参考字典。No referring back to books and notes!

不准看书和笔记！The department that you are refering to is not in existence.

你所指的.部门不存在了。The choice of the reference temperature is inconsequential

基准温度的选择是无关紧要的。