arcKK [ɑrk] /ɑɹk/發音名詞1弧、弧形、弧線The ball traveled in a high arc over the fence.球以高高的弧線飛過圍籬。2故事線、發展歷程The character's arc across the three seasons feels convincing.這個角色三季下來的成長歷程很有說服力。3電弧、弧光An arc jumped between the two electrodes with a loud crack.兩個電極之間跳出電弧，發出很大的爆裂聲。動詞1呈弧形移動、劃出弧線The rocket arced across the night sky and vanished.火箭劃出一道弧線飛越夜空後消失。