三的英文单词怎么拼

　　例句：

　　1. Three years ago he clerked in a bank.

　　三年前他在一家银行里当职员。

　　2. She ticked off three items on the list.

　　她用记号标出表格上的三个项目。

　　3. 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。