人们向来对环境和健康之间关系知之甚少，但是有关积极分子却指出这两者密切相关。

Activists have long raised concerns about the poorly understood links between the environment and health.

youdao

人们向来对环境和健康之间关系知之甚少，但是有关积极分子却指出这两者密切相关。

Activists have long raised concerns about the poorly understood links between the environment and health.

youdao