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
How many people are there in your family?
你家里有几口人？
Proverbs are the wisdom of the ages.
谚语是时代的智慧。
No. He just asked if you could ring him back. Here's the number.
没有，他只问你能不能给他回一个电话。这是他的电话号码。