1．recognize的用法小结：
（1）to know again (somebody or something ) that one has seen (or heard, etc) before 认出
I recognized Peter although I hadn't seen him for 10 years.
虽然我有10年没看到彼得了，但我认出了他。
I don't recognize this word -- what does it mean?
我不认识这个单词，它的意思是什么？
