Active hydrogen
[机] 活性氢
🧩 词语组成解析
active
['æktiv]
adj. 积极的，活跃的，有生气的;迅速的，敏捷的;有效的，起作用的;
n. [语法]主动语态;积极分子，活跃的人;
🗣️ 情景例句
May I speak to Miss Tan, please?
可以请谭小姐听电话吗？
How long have you studied English?
你学英语多久了？
You've done a wonderful job. Well done! Well done!
你真做得太棒了！