specialize in

漢語翻譯

例句：

1. In fact, we specialize in this in with a long history.
   其實我們專營此項商品已有多年的歷史了。
2. In collage I specialize in organic chemistry.
   在學院裡我主修有機化學。
3. I specialize in the sale of cotton piece goods. May I act as your agent?
   我專營棉布買賣，我可作為你們的代理嗎？