n.信;证书,许可证;字母,文字;字面意义;
vt.用字母标明;写字母于;加标题;
vi.写印刷体字母;
例句:
He was mentioned in the letter.
信上提到了他.
I had no reply to my letter.
我没有收到回信.
I merely glanced over his letter.
他的信我只是马马虎虎地看了一下.