常見(jiàn)例句drop-back short underswing upstart 支撐后倒弧形短振屈伸上backward underswing on horizontal bar 單杠上向后弧形擺動(dòng)underswing and salto forward 弧形擺接前空翻underswing kip 長(zhǎng)振屈伸上short underswing 短振 返回 underswing