n.[C]

1. 基礎，基本原理；初步，入門[the P][（+of）]
   It didn't take me long to pick up the rudiments of the language.

   我沒有費多少時間就學會了這一語言的初步知識。

2. 雛形，萌芽[the P][（+of）]
3. 發育未全的器官；退化器官[C]

n.

1. (rudiments) the first principles of a subject.
   ▸an elementary or primitive form of something.
2. Biology  an undeveloped or immature part or organ.
3. Music  a basic pattern used by drummers, such as the roll, the flam, and the paradiddle.