Unstable equilibrium
[化] 不稳定平衡
🧩 词语组成解析
🗣️ 情景例句
And we brought someone along who can help.
而且我们带来了能帮助我们的人。
May I pay by credit card?
我可以用信用卡付款吗？
One evening, however, he failed to arrive.
可是，有一天晚上，它出去后再也没回来。