Article in English: These should be roughly counter-height or just above. They should be sturdy and preferably deeper than the standard bookshelf. You can paint them beforehand if you want them to be a different color. Measure their depth and width. Decide how long you want the countertop to be. It should be at least as long as the depth of both shelves plus a little extra to create the lip of the counter but can include up to four or five feet between the bookshelves. Next, determine the width by taking the width of the bookshelves and adding a little extra to create a lip. Once you know the dimensions you need, you can purchase or make your own countertop. Make your own by purchasing medium density fiberboard (MDF) or you can go to your local hardware store and purchase any number of materials cut to the exact size that you need.  Butcher's block is a popular option as it is cheap, easy to clean, and great for use in kitchens.  Granite may also be an option but since slabs are so heavy, you will need less space between the bookshelves in order to be sure it is properly supported. If making your own from MDF, you can paint it to create a more table-like appearance or you can laminate or tile the surface to use the island for food preparation. With the shelves at the ends facing outward, place the counter on top and attach it to the shelves with brackets. These brackets will need to be screwed into bookshelves at the edges where the wood is thickest and then into the countertop, being careful not to use screws that are too long and protrude through the surface. Special considerations will need to be taken if using a granite countertop, as you cannot simply screw into the stone. Consult with your local hardware store before attempting this type of counter. If using MDF you can paint, tile, or laminate the countertop based on your needs and preference. Hooks can be bracketed or glued to the outside of the book shelves to hang kitchen towels. Depending on the type of bracket you chose to use, it may be possible to suspend a bar and...

Summary in Chinese:
准备两个完全一样的书架，书架的高度跟厨柜差不多或略高于厨柜。 测量厨房工作台的空间尺寸，并决定工作台面的长度。 定做或者购买一个现成的工作台面。 把工作台面放置到书架上。 最后还可以为台面做一些装饰。 你也可以在书架之间放置一个厨柜。