挡: 挡Ⅰ动词1.(拦住; 抵挡) keep off; ward off; block; resist 短语和例子挡道 block the road; get in the way; 挡风 shelter sth. from [keep out] the wind; 挡雨 keep off the rain; shelter one from the rain; 筑一道篱笆挡狗
螺栓: bolt; screw bolt; threaded bolt 短语和例子连接螺栓 binder bolt; connecting bolt; 地脚螺栓 foundation bolt; 螺栓保险 bolt-lock; 螺栓柄 grip of bolt
