Uld
abbr. 超声探漏器（Ultrasonic Leak Detector）；超低剂量（ultra-low-dose）
🗣️ 情景例句
to ask Dad to sign as a guarantor.
请爸爸当担保人为我签字。
You'd better give us a rough idea of your price.
您最好给我们一个粗略的价格。
I wrote: Best wishes for Teachers' Day!
我写道：“谨致以教师节的良好祝愿！”