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
Hi.
嗨。
Won't you come alone with me? My boss wants to see you.
能跟我一起来吗？我们老板有事要见你。
Hello. Can I speak to Zheng Jie, please?
喂，请找郑杰听电话。