1、 Human ecology is a branch of social science、人文生态学是社会科学的一个分支。

2、 Ecology is a branch of science that studies the relation between humans and the environment、生态学是一门研究人类与其环境之间关系的科学。

3、 More attention has been paid to workplace ecology recently、近来工作环境受到了更多地注意。