不及物动词
1. 下来;下降;走下
If you descend or if you descend a staircase, you move downwards from a higher to a lower level.
2. (情绪、气氛等)降临，笼罩
When a mood or atmosphere descends on a place or on the people there, it affects them by spreading among them.
3. （大批人）突然到来，突然造访
If a large group of people arrive to see you, especially if their visit is unexpected or causes you a lot of work, you can say that they have descended on you.
4. (夜幕、黄昏、黑暗等)降临
When night, dusk, or darkness descends, it starts to get dark.
5. 降低身份;堕落;沦落
If you say that someone descends to behaviour which you consider unacceptable, you are expressing your disapproval of the fact that they do it.
6. 陷入(糟糕境地)
When you want to emphasize that the situation that someone is entering is very bad, you can say that they are descending into that situation.
1. come as if by falling
e.g. Night fell
Silence fell
2. move downward and lower, but not necessarily all the way
e.g. The temperature is going down
The barometer is falling
The curtain fell on the diva
Her hand went up and then fell again
3. do something that one considers to be below one's dignity
Synonym: condescenddeign
4. come from
be connected by a relationship of blood, for example
e.g. She was descended from an old Italian noble family
he comes from humble origins