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
桩: Ⅰ名词(桩子) pile; pole; stake 短语和例子打桩 drive piles; set up row of stakes; 拴牛桩 a pole for tying up cattleⅡ量词(用于事情) 短语和例子一桩小事 a trifle; 一桩要案 an important case; 一桩生意 a business