normal

/ˈnɔrməl/

conforming with or constituting a norm or standard or level or type or social norm; not abnormal

中文释义：正常的；通常的

It is normal for children to feel nervous before their first day at school.

孩子们在上学第一天感到紧张是正常的。

After the surgery, his body temperature returned to normal within a few hours.

手术后，他的体温在几小时内恢复正常。