Reciprocating action
[机] 往复动作
🧩 词语组成解析
[医] 交互的, 往复的
action
['ækʃən]
n. 行动，活动;功能，作用;手段;[法]诉讼;
🗣️ 情景例句
Are they always that difficult to make?
领结这样难打吗？
It seems he's interested.
看起来他好像很有趣。
'Not at all,' I answered.
“好的。”我回答说。