Please fasten the buckle on your seat belt before the plane begins taxiing.

飛機開始滑行前，請扣好安全帶的扣環。

The customer returned the bag because the buckle broke after only two days.

這位顧客退回了包包，因為扣環才用兩天就壞了。

Our supplier offers brass and silver buckles for the new line of leather belts.

我們的供應商為新系列皮帶提供黃銅和銀色兩種扣環。