知识: knowledge, intellectual...
部件: part, component...
皮球: ball (made of rubber, leather etc)...
悲剧: tragedy...
推广: to extend, to spread, to popularize, generalization, promotion (of a product etc)...
正宗: orthodox school, traditional, old school, authentic, genuine...
后面: rear, back, behind, later, afterwards, also pr....
生病: to fall ill...
包裹: to wrap up, to bind up, bundle, parcel, package...
上去: to go up...
