Balf
abbr. 支气管肺泡灌洗液（Bronchoalveolar Lavage Fluid）
🗣️ 情景例句
He's the publisher of the Carlson Publishing Company.
他是Carlson出版公司的老板 。
The college was established in 1940.
该学院建立于1940年。
A run-down watch is still a watch and can be rewound.
手表停了依然是只手表，还可以重上好发条。