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
As you please. I'm ready.
请便。我准备好了。
He has lived here for a year.
他在这里住了一年了。[表示持续到现在的行为]
We have this problem every year.
我们每年都碰到这类问题。末了，