descent

n.

1. 下降；下倾[U][C]
   The spectators watched the descent of the balloon.

   观看的人瞧着气球降落。

2. 下坡[C]
   a steep descent

   陡峭的坡道

3. 世系，血统[U]
   Many Americans are of English descent.

   许多美国人有英国血统。

4. 遗传；派生[U]
5. 衰落；堕落[U][S1]
   his descent into a life of crime

   他沦落到靠犯罪为生

6. 屈尊；降格[U][（+to）]
7. 袭击；入侵[C][（+on/upon）]
   The Danes made numerous descents upon the English coast during the 10th century.

   丹麦人在十世纪曾对英国海岸发动过无数次袭击。

8. 【律】（遗产的）继承[U]