自发: spontaneous...
氧气: oxygen...
城墙: city wall...
如: as, as if, such as...
发呆: to stare blankly, to be stunned, to be lost in thought...
遗嘱: testament, will...
走进: to enter...
繁华: flourishing, bustling...
制服: to subdue, to check, to bring under control, (in former times) what one is allowed to wear depending on social status, uniform (army, party, school etc), livery (for company employees)...
动听: pleasant to listen to...
