descend

If you descend or if you descend a staircase, you move downward from a higher to a lower level. ^{下 (楼梯等); 下来}

verb [vt. 及物动词]下来，下降；下倾，下斜；降临，来临；（情绪、气氛等）笼罩；突然到来，突然造访；降低身份，堕落；衰落，陷入；遗传

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.
突然到访

descend 出现在下面的课文中: Lesson 41 Illusions of pastoral peace descend 动词: 下落，降临; Lesson 91 Three men in a basket

vi. 下降；下来；遗传；屈尊；下去

单词造句:

相关词汇

反义词ascend/əˈsend/vi. 上升；登高；追溯

复合词descendant/dɪˈsendənt/adj. 下降的；祖传的

关联词descent/dɪˈsent/n. 下降；血统；袭击

词组	含义	例句
be descend from	祖先是……的后裔：指某人是某个祖先的后代。	He claims to be descended from a Spanish prince. ^{他声称是一位西班牙王子的后裔。}
descend on	突然到达，蜂拥而至：指一群人突然到达某个地方或某个人身边，通常是没有事先通知或邀请的。	Some 3,000 city officials will descend on Capitol Hill on Tuesday to lobby for more money. ^{大约三千名市政官员将于周二突访美国国会山，为争取更多经费游说。}
descend on	(事物做主语)突然降临	Something frightful was about to descend on him. ^{可怕的灾祸就要降临到他头上了。}