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A multiplicity is a large number of things, and they are usually not all the same kind. When someone “a multiplicity of voices” or “a multiplicity of reasons,” they mean there are many, and they pull in different directions.
A multiplicity is a large number of thingsmultiplicity指的是數量很多的東西, and they are usually not all the same kind而且通常種類不完全一樣。When someone writes "a multiplicity of voices" or "a multiplicity of reasons,"當有人寫下「a multiplicity of voices」或「a multiplicity of reasons」時，they mean there are many他們的意思是數量很多，and they pull in different directions而且方向各不相同。
It is a formal, slightly noun; in everyday talk we just say “lots of different…” or “all kinds of…”.
It is a formal, slightly bookish noun這是個正式、有點書面味的名詞；in everyday talk we just say "lots of different…" or "all kinds of…"日常說話我們就直接說「lots of different…」或「all kinds of…」。
Though actually, it is not a fancy twin of “multiple.” Multiple is usually an adjective sitting in front of a noun (“multiple reasons”); multiplicity is the pile itself.
Though actually, it is not a fancy twin of "multiple."不過其實，它並不是multiple的花俏雙胞胎。Multiple is usually an adjective sitting in front of a nounmultiple通常是放在名詞前面的形容詞 ("multiple reasons")（像「multiple reasons」）；multiplicity is the pile itself而multiplicity講的是那一整堆東西本身。
You will also meet a tighter use in maths, where the multiplicity of a root is how many times that root counts — same idea of “how many,” but as a precise score rather than a mixed crowd.
You will also meet a tighter use in maths在數學裡你還會遇到一個更精確的用法, where the multiplicity of a root is how many times that root counts一個根的multiplicity指的是那個根出現的次數——same idea of "how many,"一樣是「多少」的概念, but as a precise score rather than a mixed crowd但這裡是精確的計數，而不是一堆混雜的東西。
原始詞典資料6 筆記錄
以下是外部詞典記錄的用法，原文照列，我們還沒有寫成教學內容。上面的說明才是我們自己寫的；有些用法可能上面已經講過了。
multiplicitynoun/ˌmʌltɪˈplɪsɪti/
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The state of being made of multiple diverse elements.
- Any failure of their predictions can be explained away by saying that the theory is not a schematic one, that a multiplicity of factors have to be considered, etc.
- Without consideration of the colony character of Malaysia in terms of its consistent interculturation with imperial and neoimperial power, multiplicity can easily be mistheorised as representing Saidian Orientalism or expatriates—such theorisations can be drawn from superficial reinterpretations of Taiwan's Tenryuubito phenomenon in recent years and Japan's Datsu-A Ron statement during the Meiji period.
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A large indeterminate number.
- The coronary Thorns did not only express the scorn of the imposers, by that figure into which they were contrived; but did also pierce his tender and sacred temples to a multiplicity of pains, by their numerous acuminations.
- They saddled themselves with the handling of light flows on a multiplicity of branch lines, and they sacrificed the speed, reliability and low cost of through train operation, even over the main arteries of the system.
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mathematicssciencesThe number of values for which a given condition holds.
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computingengineeringmathematicsThe number of instances that can occur on a given end of a relationship.
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The number of microstates associated with a given macrostate.
- In short , we are not replacing the old idea that “entropy is the logarithm of the multiplicity (times Boltzmann's constant). ” Rather , we are retaining that idea but are generalizing the notion of multiplicity.
- ... the maximum-entropy (maxent) solution is the one which occurs with greatest multiplicity.
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human-sciencespsychologysciencesThe condition whereby a person displays or experiences multiple distinct personalities or selves in one body.
資料來源：英文維基詞典 English Wiktionary（CC BY-SA 4.0）。 原文照列，未經改寫。