nature

1. the usual way that a person or an animal behaves that is part of their character 天性；本性；性格

2. a basic quality that something has本质；性质
   the nature of steel
   钢的特性
   What is the true nature of democracy?
   Her writing is humorous in nature. [=her writing has humorous qualities]
   她的文风诙谐幽默。