雖然Eric努力保持集中在課堂上，他的頭腦保持徘徊。

雖然Eric努力保持集中在課堂上，他的頭腦保持徘徊。

ผลลัพธ์ (อังกฤษ) 1:

Though Eric tried to keep focused in the classroom, his mind wandering.

ผลลัพธ์ (อังกฤษ) 2:

Although Eric trying to stay focused in class, his mind kept wandering.

ผลลัพธ์ (อังกฤษ) 3:

Although Eric efforts to stay focused on the classroom, his mind kept wandering.