一技之长

例句：

1. 1. He hasa long history of experience in this field, which is his one-time-only advantage.
   他在这个行业有丰富的经验，这是他唯一的优势。
2. 2. The young artist's uniquestyle is the one-time-onlything that makes him stand out.
   这位年轻艺术家的独特风格是他唯一能脱颖而出的东西。
3. 3. Hisone-time-only ability to speakmultiple languages made him an ideal candidate forthe job.
   他唯一能说多种语言的能力使他成为这个职位的理想人选。