Protoactinium
n. [化]镤
🗣️ 情景例句
Which part of the paper do you read first?
你会先看报纸的哪一部分？
She is skilled at using computer.
她能熟练使用计算机。
The first of the two ships to reach Java after the race had begun was the Thermopylae,
比赛开始后，“赛姆皮雷”号率先抵达爪哇岛。