abbr. 二进制模拟转换（Binary-Analog Conversion）；（美国）波音飞机公司（Boeing Airplane Company）；英国飞机公司（British Aircraft Corporation）

n. A broad, flatbottomed ferryboat, usually worked by a rope.
n. A vat or cistern. See 1st Back.

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学英语单词

architecture of operating system

arylalkylamines

axis of centres

bellows joint