major in

漢語翻譯

例句：

1. Mr.Lee said he would major in history and he means business.
   李先生說他要專攻歷史，他是決心認真乾的。
2. I major in engineering, but this machine is hard to handle.
   雖然我學的是機電專業，但這機器還是很難修。
3. She majors in history.
   她主修歷史。
4. I major in science.
   我主修自然科學。