1、3的英文是three。

2、音标：英 [θriː] 美 [θri]

3、Three years ago he clerked in a bank. 三年前他在一家银行里当职员。

4、She ticked off three items on the list. 她用记号标出表格上的三个项目。

5、I had only danced with Mary about three minutes when someone cut in. 我和玛丽刚刚跳了大约三分钟的舞，就有人来截舞。