Secure the edges firmly to make certain that no moisture can get in.把边缘扣紧以防潮气进去。Outside they fastened their coats against the bitter wind.在户外，他们扣紧外套以抵御寒风。The straps fasten with Velcro.背带是用尼龙搭扣扣紧的。Buckle up your case.扣紧你的箱子。Have you fastened down the windows?你把窗子扣紧了吗？