Radon content
[医] 氡含量
🧩 词语组成解析
radon
['reidɔn]
n. <化>氡（元素符号Rn）;
🗣️ 情景例句
you can help me with dinner.
你就来帮我准备晚餐。
How much does packing take up of the total cost of the goods?
包装占货物总成本的百分比是多少？
I shall never forget that extraordinary evening.
我永远忘记不了那个不平凡的夜晚。