"a cardinal rule"
"the central cause of the problem"
"an example that was fundamental to the argument"
"computers are fundamental to modern industrial structure"
having existed from the beginning; in an earliest or original stage or state;
"aboriginal forests"
"primal eras before the appearance of life on earth"
"the forest primeval"
"primordial matter"
"primordial forms of life"
primal的用法和樣例：
例句
用作形容詞 (adj.)
Then primal sedateness came back. 而後世界又恢復了最初的安詳。
I'm sure that I will actualize the primal promise. 我確信我能實現最初的諾言。
In these primal skies, there was no Moon. 在原始的天空里，沒有月亮。
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