buckle [ˈbʌkl]

以下由轻松背单词网站提供

n.扣子，带扣；v.把...扣住，由于压力而弯曲

a piece of metal at one end of a belt or strap , used to fasten the two ends together

The two ends buckle at the back. 带子两端在背后扣起来。
She found it hard to buckle down. 她很难专心做一件事情。