原视频：Why Do We Cry When We're Sad?（SciShow Kids）
难度：中级；分类：少儿；时长：3:10；标签：美音、讲解、心理
SciShow Kids 用孩子能理解的方式解释眼泪和情绪，篇幅短，适合亲子共听，练习身体与感受相关词汇。
视频以球被弄坏为例，解释悲伤时哭泣的作用：传达情绪、帮助他人理解并提供支持，也可能缓解痛苦。
We could patch it, but the air would still leak out.
We could patch it, but the air would still leak out.
a rock, and it popped!
It’s okay to be sad about it.
about it, then I might do something insensitive without realizing it and make things worse.
But if I didn’t know you were sad, I might not realize it would be hurtful.
And one of the other ingredients in tears is a painkiller — something that makes pain
this is something that your body makes by itself.