rudimentary

a. 基本的(初步的,起码的,根本的)

I have only a rudimentary grasp of physics.

我对物理学仅有初步的了解。

Sylvia's rudimentary knowledge of chess was more than enough to beat Peter, who had seldom played the game before; on the country of the blind….

西尔维尔的象棋基础知识足以战胜彼得，因为彼得以前很少参加比赛，山中无老虎，猴子称王…。