deaf/def/

a. unable to hear

n. [the ~] people who cannot hear

a. 聋的：He is deaf in his left ear. 他左耳聋。

◇He was born deaf. 他天生耳聋。

n. [the ~] [P] 耳聋的人，聋子：Today the deaf are taught to understand others by watching their lips. 如今，聋人被教授通过观察嘴唇来理解其他人。

常犯错误

✗ His ears are deaf.

✓ He is deaf. 他耳聋。

巧记 由the + a. 转变过来的名词，表示一类人，又如：the dead; the blind。