Replace the batteries and refasten the cover.

请更换电池,再将盖子盖紧.

Lenny took his bare red hands out of his pockets and bent down to refasten the snow-crusted, icy metal clasps.

他将冻得通红的手出来，弯下腰，将冰雪覆盖的金属扣又重新扣上。

Norman stooped to refasten the padlock.

诺曼弯下腰重新锁好挂锁。