a B picture 第二流影片。 A B student 成績乙等的學生。 B battery 【無線電】 B 電池組。 B flat 【音樂】降 B 調〔記號 B〕。 B major [minor] 【音樂】 B 大調[小調]。 Not know B from bull's foot 見牛腳而不識B字;目不識丁;文盲〔英語字母B源于腓尼基象形文字“牛”。牛為偶蹄類,腳趾形似字母B。見牛趾而不識B字,喻文盲極其無知,故有此說〕。
(physics) a unit of nuclear cross section; the effective circular area that one particle presents to another as a target for an encounter 同義詞:barn,
百科解釋
B (named bee "B" Oxford English Dictionary, 2nd edition (1989); Merriam-Webster's Third New International Dictionary of the English Language, Unabridged (1993); "bee", op. cit.