Ul
abbr. （美）保险商实验所（Underwriters' Laboratories）
🗣️ 情景例句
Yes, I read you loud and clear.
嗯，我完全明白。
You can receive our program at short wave 37.5 MH.
你可在短波37.5赫兹上收到我们的节目。
No matter how many guests were present, the great house was always immaculate.
不管去多少宾客，大房子里总是收拾得干干净净。