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N-VAR
下降;降落
A descent is a movement from a higher to a lower level or position.
例句
Sixteen of the youngsters set off for help, but during the descent three collapsed in the cold and rain.
16 名年輕人出發去尋求幫助，但在下山過程中有 3 人因寒冷和大雨暈倒了。
...the crash of an Airbus A300 on its descent into Kathmandu airport.
空客 A300 在加德滿都機場降落時的墜毀
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N-COUNT
斜坡;斜面
A descent is a surface that slopes downwards, for example the side of a steep hill.
例句
On the descents, cyclists spin past cars, freewheeling downhill at tremendous speed.
在坡道上，自行車手飛馳著超越了一輛輛汽車，靠著慣性一路疾沖下山。
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N-SING
(形勢的)惡化;(人的)墮落，淪落
When you want to emphasize that a situation becomes very bad, you can talk about someone's or something's descent into that situation.
例句
The only lasting solution lies in a political settlement. Without it, their descent into chaos will be guaranteed.
唯一的長久之計是通過政治手段解決。否則，他們勢必會陷入一片混亂。
...his swift descent from respected academic to struggling small businessman.
他從一名受人尊敬的學者到一個度日艱難的小商人的瞬間淪落
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N-UNCOUNT
血統;家世;出身
You use descent to talk about a person's family background, for example their nationality or social status.
例句
All the contributors were of African descent.
所有的撰稿人都是非裔人士。