"unbuckled" in Chinese (Simplified)
解开（扣子、皮带等）
Definition
指解开扣子、皮带、鞋带或安全带等带有卡扣的物品。意思是让原本扣住的东西松开或打开。
Usage Notes (Chinese (Simplified))
常用于带有金属搭扣的物品，如安全带、皮带或鞋，说明书和安全提示中常见。不能用于拉链或普通纽扣。
Examples
He unbuckled his seatbelt after the car stopped.
汽车停下后，他**解开**了安全带。
She unbuckled her belt before sitting down.
她在坐下前**解开**了皮带。
The child unbuckled his shoe by himself.
孩子自己**解开**了鞋子的扣子。
Once the airplane landed, passengers quickly unbuckled and grabbed their bags.
飞机降落后，乘客们迅速**解开**安全带，拿起了行李。
He smiled as he unbuckled the strap of his backpack.
他微笑着**解开**了背包的带子。
Don’t forget to unbuckle before you get out of the car!
下车前别忘了**解开**安全带！