听力资源简介：

healthy　
(a.) 有益健康的

Eating fruit and vegetables is healthy.
吃水果和蔬菜有益健康。

negative　
(a.) 消极的

Doug is a negative person. He always thinks bad things will happen to him.
道格是个消极的人。他老是认为坏事会发生在他身上。