形容詞 understandable:

1. capable of being apprehended or understood
   同義詞：apprehensible, intelligible, graspable, perceivable

1. The fear of intellectuals to be seen as advocates of reason is the final treason of the clerks. To be cowardly under fire is understandable, but to cower when there is a world to be taught(and to learn from) is contemptible.
   害怕知識(shí)分子被看作理智的倡導(dǎo)者，這是知識(shí)分子對(duì)知識(shí)和道德價(jià)值的最終貶低。在炮火襲擊下畏縮尚可理解，而面對(duì)一個(gè)需要教導(dǎo)(也可從中學(xué)習(xí))的世界卻當(dāng)懦夫則是卑鄙的。
2. It's perfectly simple and understandable. You needn't dress it up with all this nonsense.
   這件事非常簡(jiǎn)單易懂，你不必用這些廢話(huà)來(lái)渲染它。
3. The instructions were not readily/easily understandable.
   這份說(shuō)明書(shū)不容易懂。

un.der.stand.a.ble

adj.（形容詞）
Capable of being understood:
可以理解的：
例句：
an understandable sentence.
可以令人理解的句子

Expected or accepted under the circumstances:
預(yù)期的，可接受的：在此情況下期待發(fā)生的或可接受的：
例句：
Their anger is understandable, given what happened.
考慮到發(fā)生的狀況，可以理解他們的憤怒

【引伸】
un.derstand.abil.ity
n.（名詞）
【引伸】
un.derstand.ably
adv.（副詞）