H. e. d.
[医] 皮肤单位剂量(X线)
🧩 词语组成解析
[医] 普朗克氏量子常数
[医] 电子\\n[经] 东
🗣️ 情景例句
We have strict procedure around here and we expect all of our staff to follow it.
我们这儿有非常严格的工作程序，希望全体员工遵守。
Money spent on the brain is never spent in vain.
智力投资，决非虚掷。
What will be the population of these countries by the end of the twentieth century?
到20世界末较发达国家的人口将是多少？