1.(有热情; 有兴趣) enthusiastic; ardent; earnest; warmhearted;Caring:热心传授技术 make earnest efforts to pass on one's skill; 热心提倡 enthusiastic about promoting; 热心科学 eager to promote science; 热心为顾客服务 warmheartedly serve the customers; 热心防止环境污染的人士 eco-activist2.(热情) enthusiasm; earnestness; ardour; zeal