B.t.u.
abbr. 英国热量单位（British thermal unit）；英国商务部单位（Board of Trade Unit）
🗣️ 情景例句
a game which I brought home to study.
我带回来研究的游戏。
When the cat's away the mice will play.
猫儿不在，老鼠造反。
All right. Just for a minute. I came to give you a message.
好！稍等一会儿。我来给你捎个口信。