If something is axiomatic, you can see that it is true without a long proof. It sits at the same level as an axiom: obvious enough, or agreed enough, that arguing it feels like a waste. “It is axiomatic that children need sleep” means we take that as given.

If如果 something是 is axiomatic某件事是axiomatic的，you你就能 can see that it is true without a long proof不用長篇論證就能看出它是真的。It它 sits at the same level as an axiom跟公理站在同一個層級：obvious enough, or agreed enough, that arguing it feels like a waste夠明顯，或是夠有共識，去爭論它反而顯得浪費。"It is axiomatic that children need sleep""It is axiomatic that children need sleep" means代表 we take that as given我們把這件事當作理所當然。

In maths, an axiomatic system is one built from named axioms. In ordinary writing the adjective often means “so basic we should not have to say it.” Though actually writers also use it with a little heat, as if the other person should already know: “It is axiomatic that you do not spend money you do not have.” That can sound calmly sure, or it can sound pushy, depending on the room.

In maths在數學裡，an axiomatic system一個axiomatic system（公理系統） is是 one built from named axioms一套建立在明確命名的公理之上的系統。In ordinary writing在一般的寫作裡 the adjective這個形容詞 often means "so basic we should not have to say it."常常代表「這件事太基本了，本來就不用講出來」的意思。Though actually不過事實上 writers也 also use it with a little heat作家用起來有時候也帶點火氣，as if好像 the other person should already know對方本來就該知道："It is axiomatic that you do not spend money you do not have.""It is axiomatic that you do not spend money you do not have."這句話 That那樣 can sound calmly sure, or it can sound pushy可以聽起來很篤定冷靜，也可以聽起來很咄咄逼人，depending on the room看情境而定。

It is a formal, educated word. You will not hear it much in the playground.

It它 is是 a formal, educated word一個正式、有學識感的字。You你不太會 will not hear it much在遊樂場上不太會聽到 in the playground。

Use it when the truth is treated as already settled — not when you are still looking for evidence.

Use使用 it it when the truth is treated as already settled當一件事的真實性已經被當作定案時——not when you are still looking for evidence而不是你還在尋找證據的時候。