unbuckle /ʌnˈbʌkəl/ ( unbuckling, unbuckled, unbuckles )

• 1. 

  V-T If you unbuckle something such as a belt or a shoe, you undo the buckle fastening it. 解开(皮带、鞋带); 松开(搭扣)

  例：

  He unbuckled his seat belt.

  他松开了他的安全带搭扣。