Radon emanation
[医] 氡射气
🧩 词语组成解析
radon
['reidɔn]
n. <化>氡（元素符号Rn）;
n. 散发, 发出\\n[化] 射气
🗣️ 情景例句
Did you sleep soundly last night.
你昨晚睡得好吗？
I ought to go to bed now.
我应该现在去睡觉。
To my surprise, he gave me the money immediately.
令我惊奇的是，他立刻把钱给了我。