Unstable arc
[化] 不稳定电弧
🧩 词语组成解析
arc
[ɑ:k]
n. 综合症状;弧（度）;天穹;电弧，弧光。;
vi. 形成拱状物;循弧线行进;
abbr. American Red Cross. 美国红十字会;
🗣️ 情景例句
She told Robbie that her flight tomorrow was canceled,
她告诉Robbie说 她明天的班机取消了
Not bad.
不赖嘛！
That's easy. I can do that tomorrow. I'll bring my drill.
那容易。我明天就做。我把钻头带来。