rudimentary

形容词 rudimentary:

1. being or involving basic facts or principles
   同义词：fundamental, underlying
2. being in the earliest stages of development
3. not fully developed in mature animals
   同义词：vestigial

1. 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 ... 。
2. Elementary or rudimentary.
   基本的，初步的
3. I have only a rudimentary grasp of physics.
   我对物理学仅有初步的了解。

ru.di.men.ta.ry

adj.（形容词）
Of or relating to basic facts or principles; elementary.
基本的，初步的；有关基本事实或原理的
Being in the earliest stages of development; incipient.
处于发展的最早阶段的；尚未发展完全的
Biology Imperfectly or incompletely developed; embryonic:
【生物学】 未完善或未完全发育的；未成熟的：
例句：
a rudimentary beak.
未成熟的喙

【引伸】
ru.dimentar.ily
ru.dimen.tariness
n.（名词）