in full swing
充分进行、发展或繁忙
口语·描述活动正热烈进行
英文释义
to be at the peak or height of an activity or event
例句
The party was in full swing when we arrived, with music and dancing everywhere.
典故来源
源自钟摆运动，指摆锤达到最大幅度时的活跃状态，比喻活动或事件处于最繁忙或高潮阶段。