笑是减压器，笑是免疫助推器，笑是心脏辅助器，笑是自信生成器。

Laughter is a stress-reducer, immunity-booster, heart-helper, and confidence-builder.

youdao

笑是减压器，笑是免疫助推器，笑是心脏辅助器，笑是自信生成器。

Laughter is a stress-reducer, immunity-booster, heart-helper, and confidence-builder.

youdao