descend
/dɪˈsend/- move or fall downwards下降; 落下：
the aircraft began to descend.
飞机开始下降。
- with obj. move down (a slope or stairs)下（坡, 楼梯）：
the vehicle descended a ramp.
车驶下了斜坡。
- (of stairs, a road or path, or a piece of land) be on a slope or incline and extend downwards（楼梯, 道路, 小径, 土地）下斜, 下倾：
a side road descended into the forest
一条岔道下斜着延伸到森林中
with obj. a narrow flight of stairs descended a steep slope.一段狭窄的楼梯陡陡地通到下面。
- come or go down a scale, especially from the superior to the inferior（尤指从优到劣）依次递降：
as adj. descending the categories are listed in descending order of usefulness.这些品种按实用价值递减的顺序列出。
- Music (of sound) become lower in pitch【乐】（声响）渐低, 下行：
as adj. descending a passage of descending chords.渐低和弦乐段。
descend to
act in a specified shameful way that is far below one's usual standards降低人格做事, 堕落到：he was scrupulous in refusing to descend to misrepresentation.
他为人正直审慎, 拒绝做人所不齿的歪曲真相之事。
descend into
(of a situation or group of people) reach (a state considered undesirable or shameful)（情况, 群体）沦落到…的地步：the army had descended into chaos.
军队已陷入了一片混乱。
descend on/upon
make a sudden attack on突袭：the militia descended on Rye.
民兵突袭拉伊。
descend on/upon
make an unexpected and typically unwelcome visit to突然来到, 突然造访：groups of visiting supporters descended on a local pub.
一批批外来的支持者突然来到了当地一家酒吧。
- (of a feeling or atmosphere) develop suddenly and be felt throughout a place or by a person or group of people（感觉, 气氛）突然笼罩：
an air of gloom descended on Labour party headquarters.
一片沮丧的气氛突然笼罩着工党总部。
- (of night or darkness) begin to occur（夜色, 黑暗）降临：
as the winter darkness descended, the fighting ceased.
随着冬日夜幕的降临, 战斗停止了。
be descended from
be a blood relative of (a specified, typically illustrious ancestor)是…的后裔（尤指是望族的后裔）：John Dalrymple was descended from an ancient Ayrshire family.
约翰·达尔林普尔是艾尔郡一古老家族的后裔。
- (of an asset) pass by inheritance, typically from parent to child（资产）交由…继承：
his lands descended to his eldest son.
他的土地传给了长子。