principal與 principle的區別
Both principal and principle come from the same root word in Latin, primus, or prime. The two words are linked, which accounts for their distinct but similar meanings.
principal和principle都來自於同一拉丁語詞根，primus或prime。這兩個單詞雖然不同但相似的含義使得這它們常被聯繫起來。
Principal
Principal has two meanings, one as an adjective and the other as a noun. However, they have the same pattern: they mean something or someone that is a leader, the first, and/or the most important.
Principal有兩個意思，一個是作爲形容詞，另一個是作爲名詞。這兩個單詞儘管詞性不同，卻有相同含義：皆爲某事或某人是主導/領導，第一個或最重要的。
Noun: the head, chief, or leader; the leader of a school; the initial sum of an investment
名詞詞性：首腦、首席或領導；學校的領導；投資的初始金額
Adjective: the most important, the chief; referring to the initial sum of an investment
形容詞詞性：最重要的，主要的；指投資的初始金額。
Principle
Principle is always a noun, unless the word is in a different form.
Principe除變形外只爲名詞。
Noun: A truth or idea that serves as the foundation for something, such as a belief, behavior, or moral code; an accepted rule for conduct
名詞詞性：作爲某事基礎的真理或想法依據，如信仰、行爲或道德準則；公認的行爲準則
Principled is the adjective form of principle. It simply describes something (a person, moral code, etc.) that is founded on principles.
Principled是principle的形容詞形式。只用來描述基於原則的事物（如，人，道德準則等）。
