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
Yes, I remember. You were a great help.
是的， 我记得。你帮了个大忙。
Why don't we go to the office now?
为何我们现在不去办公室呢？
Betty and Susan are talking on the telephone.
贝蒂和苏珊正在通电话。