U-v
[计]= UltraViolet,紫外线
🗣️ 情景例句
Well, he wakes up several times during the night,
噢， 他一夜醒了好几次，
What would you have done last night if you hadn't had to study?
如果昨晚你不必学习你会做什么？
Sir James Clark Ross had obtained a sounding of over 2,400 fathoms in 1839,
在1839年，詹姆斯·克拉克·罗斯爵士曾测得海水深度超过2，400英尺；