J-Teisai

例句：

1. 1.He is a teacher who teaches English as his native language.
   他是一个以英语为母语的教师。
2. 2.She is a student who studies Chinese as her second language.
   她是一个学习汉语作为第二语言的学生。
3. 3. He is a musician who plays the piano as his favorite instrument.
   他是一位演奏钢琴作为最爱乐器的音乐家。