短語詞組短語roof plummet 頂點對點器plummet to 驟降至lead plummet 鉛垂球;垂球Method plummet 錘測法Plummet Fittings 鉛錘配件包plummet popularity 垂直落下Penguin Plummet 企鵝跳水laser plummet 激光垂準(zhǔn)儀;激光對點器;雷射垂準(zhǔn)儀 返回 plummet