a. conforming with or constituting a norm or standard or level or type or social norm; not abnormal
a. in accordance with scientific laws
a. being approximately average or within certain limits in e.g. intelligence and development
s. forming a right angle
n. 常态, 标准, 正常, 普通
a. 正常的, 正规的, 标准的, 师范的, 正态的
[计] 标准, 普通