他热心教学。

Tā rèxīn jiàoxué.

He is dedicated to teaching.

她喜欢热心帮助别人。

Tā xǐhuan rèxīn bāngzhù biérén.

She likes helping others enthusiastically.

谢谢大家热心的帮忙。

Xièxie dàjiā rèxīn de bāngmáng.

Thank you all for your kind help.