Piston action
[电] 活塞作用
🧩 词语组成解析
piston
['pɪstən]
n. <机>活塞;
action
['ækʃən]
n. 行动，活动;功能，作用;手段;[法]诉讼;
🗣️ 情景例句
The battle was very historic.
那场战役在历史上很重要。
What did you ask him?
你问他什么？
It took great imagination as well as patience for Annie to teach me to speak.
教我说话需要极大的想像力和耐心。