只有一个

• have but one

例句

1. 只有一个男孩儿缺席，就是哈里。
   Only one boy was absent, namely Harry.
2. 他只有一个心思--想的都是性事！
   He's got a one-track mind -- all he ever thinks about is sex!
3. 这些票的有效期只有一个月。
   These tickets are available for one month only.
4. 只有一个人能做这项工作，那就是你。
   Only one person can do the job, namely you.
5. 只有一个卧室，所以我们得合著用。
   There's only one bedroom, so we'll have to share.