descent 和 descend用法上有什么区别

descent 名词
descend 动词
We are watching the descent of the Olympic falg.
The elevator is descending slowly.

descent 名词descend 动词。
例句：descent (noun)the state or fact of being related to a particular person or group of people who lived in the past:
She's a woman of mixed/French descent.
They trace their line of descent back to a French duke.
He claims direct descent from Mohammed.
descend (verb)
formal to go or come down:
The path descended steeply into the valley.
Jane descended the stairs.
literary If darkness or night descends, it becomes dark and day changes to night.

作下降意思时，
descent 是名词
descend 是动词