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
Harry potter was a box office smash.
《哈里波特》赢得了相当可观的票房收入。
Hedges have eyes, and walls have ears.
篱笆有眼，隔墙有耳。
Very excited, the party dug a hole two feel deep.
队员们异常激动，就地挖了一个两英尺深的坑，