Word: 热心 (rèxīn) Traditional: 熱心 热心 dictionary entry rèxīn enthusiastic Full dictionary entry for 热心 Example sentences using 热心 2 sentences, showing page 1 of 1. 老师对学生非常热心。 Lǎoshī duì xuésheng fēicháng rèxīn. The teacher is very enthusiastic about helping students. 这本书是他热心研究的成果。 Zhè běn shū shì tā rèxīn yánjiū de chéngguǒ. This book is a result of his enthusiastic research.