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
Thank you.
谢谢。
His visit was well timed.
他的访问正合时宜。
Long ago, people believed that the world was flat.
很久以前人们相信地球是平的。