descend

音标发音

adj性质的同根词
descendant：下降的；祖传的。
descending：下降的；下行的。
n性质的同根词
descendant：后裔；子孙。
descent：下降；血统；袭击。
descending：递减；下行。
descender：下降物；下降者；下行字母。
v性质的同根词
descending：下降（descend的ing形式）。
vt性质的同根词
descent：除去…的气味；使…失去香味。

descend的基本意思是“下来”“下去”,可指物体向下降落,也可指沿着山坡、梯子、台阶、树干等表示斜线或斜坡的物体下降。
descend可用作及物动词,也可用作不及物动词,用作不及物动词时,常与介词from连用,表示“是…的后代”“从…传下来”, from所接的名词指祖先、祖宗,并不是指父辈。
descend是正式书面用语,多用于文学语体中。

(POSITION) to go or come down
(NEGATIVE MOOD) If a negative or bad feeling descends, it is felt everywhere in a place or by everyone at the same time.

If you descend or if you descend a staircase, you move downward from a higher to a lower level.
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.
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.
If you say that someone descends to behaviour which you consider unacceptable, you are expressing your disapproval of the fact that they do it.

下降
On the other hand, when the remote sensor runs on orbit, its performance will gradually degenerate and MTF will gradually descend too.
另一方面，随着卫星遥感器在轨运行时间的增长，其性能会逐渐退化，MTF也会逐渐下降。
后裔
后代