First, read the English article below.

The shelf boards should all be the same length; if not, cut them to the same length. You can also use cinder blocks, in which case you'll only need one on each side rather than the two bricks. Since the shelf has little support, it needs to be flush against a wall, or have some sort of similar flat backing. Place another two bricks together on the opposite side to form the base of the shelving. The distance between the bricks should be determined by the plank length, with a small amount of plank overhanging at each side (about a 2 inches). There should be two bricks on each side of the shelf to support it. You'll place the first shelf board onto the base bricks. Then place two bricks side by side on the shelf in the same position as the base bricks.  This time, add two sets more bricks on top to make a pillar. Do the same for the other side. The shelf has been made. It's simple but it's adequate for keeping things like books, DVDs and CDs in order. If you want to strengthen this structure, add a cross-brace to the back of the shelf unit, screwing it into the shelf boards. 

Now, please write a short abstract for it in Chinese. Abstract:
找一些砖和搁板。 选择一个适合放置格架的地方。 在地面放两块摞在一起的砖头。 将第一块木板放到砖基砖上。 再继续添加搁板。