Action and reaction
作用力与反作用力
🧩 词语组成解析
action
['ækʃən]
n. 行动，活动;功能，作用;手段;[法]诉讼;
and
[ənd, ən,ænd]
conj. 和，与;而且;于是，然后;因此;
🗣️ 情景例句
Why is that necessary?
为什么有此必要
You cannot make a silk purse out of a sow's ear.
猪耳朵做不成丝钱包；巧妇难为无米之炊。
Many of the tourists on board had begun bargaining with the tradesmen, but I decide not to buy anything until I had disembarked.
船上许多游客开始同商贩讨价还价起来，但我打定主意上岸之前什么也不买。