U-v
[计]= UltraViolet,紫外线
🗣️ 情景例句
Pleased to meet you.
很高兴见到 。
It's not too heavy,but I don't know the exact weight.
它不是太重的，但是我不知道准确的重量。
Thank you.I'll certainly be more careful.
谢谢您。我以后一定会多加注意。