词根human+kind词缀，中文意思是n. 人类（总称）
When Pandora's box was opened， it unleashed swarms of diseases and disasters upon humankind.潘多拉的盒子打开之时，便给人类带来了无数的疾病和灾难。
It seems that humankind is to be destroyed because they irritate the gods with their tumult and noise.似乎是人类是要被毁灭的，因为人类的骚乱和噪音惹怒众神。
