But since my friend Lin Xia and I had a date I had to get up early.

但因为我和朋友林霞有个约会，因此必须早起。

youdao

But there exit many problems among the students in Lin Xia Middle School, where I am working. It has always been a difficult point for the students to master.

但是在我任教的临夏中学的学生对这一内容掌握的不是很好，说明学生在圆锥曲线的学习中存在着障碍。

youdao

But there exit many problems among the students in Lin Xia Middle School, where I am working. It has always been a difficult point for the students to master.

但是在我任教的临夏中学的学生对这一内容掌握的不是很好，说明学生在圆锥曲线的学习中存在着障碍。

youdao