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Also known as Greek letter beta, beta letter
第2個希臘字母
Beta is the second letter of the Greek alphabet, representing the number 2 in the ancient Greek numerical system. In different time periods and languages, it has represented different sounds—a "b" sound in Ancient Greek and a different sound in Modern Greek—and it eventually became the basis for the letter B in Roman and other writing systems.
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Article · 中文
Beta（Βήτα；大寫Β，小寫β，中文音译：贝塔、貝他、啤打，音/'viːta/，英语读法/biːtə/ ），是第二個希臘字母。在古希臘語，beta讀作[b]，但現代希臘語讀作[v]。現代希臘語以"μπ"代表[b]音。英文「Beta version」為「測試版本」之意。 小寫的β代表： * 在粒子物理學，beta粒子（電子）和beta衰變 * 在狭义相對論，物件的速率相對於光速（β = v/c） * 國際音標中的濁雙唇擦音 * 埃拉托斯特尼的外号 beta的英式英語讀音是/'biː.tə/，但美式英語讀音是/'beı.tə/ 。 西里爾字母的Б、В和拉丁字母的B都是從beta變來。
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