Uld
abbr. 超声探漏器（Ultrasonic Leak Detector）；超低剂量（ultra-low-dose）
🗣️ 情景例句
Hi!
嗨！
I ought to see the manager.
我应该见经理。
In the afternoon, classes are over at 3:30, and I get home at about 4:00.
下午三点半下课，我大概四点到家。