bk (1)银行 bank. (2)书籍；帐簿 book. (3)延期交割费；差价 见backwardation.

BK 退格,回退

Bk n. 放射性元素锫(Berkelium)

berkelium(Bk) 锫

bk. (1)银行 bank. (2)书籍；帐簿 book. (3)延期交割费；差价 见backwardation.