Action principle
[化] 作用原理
🧩 词语组成解析
action
['ækʃən]
n. 行动，活动;功能，作用;手段;[法]诉讼;
🗣️ 情景例句
Keep a small English dictionary with you at all time.
随身携带一本小英文字典。
The more a man knows, the more he is inclined to be modest.
大智若愚。
Hello! Is there anyone at home?
喂！家里有人吗？