Balf
abbr. 支气管肺泡灌洗液（Bronchoalveolar Lavage Fluid）
🗣️ 情景例句
There we go ... will make twenty. Thanks.
你看……加起来正好二十美元。谢谢了。
How much of a volume discount are you prepared to offer?
总折扣你们准备提供多少？
How do you know?
你怎么知道？