一句话一个克林斯字典基本单词B

251、build up to            
            If you build up to something you want to do or say, you try to prepare people for it by starting to do it or introducing the subject gradually.
    

252、building        
            A building is a structure that has a roof and walls, for example a house or a factory.
      

253、built        
      Built is the past tense and past participle of build.
   
   

254、Bulgarian        
      Bulgarian means belonging or relating to Bulgaria, or to its people, language, or culture.
   

255、bunch        
      A bunch of people is a group of people who share one or more characteristics or who are doing something together. (INFORMAL)
   

256、bunch up, bunch together              
            If people or things bunch up or if you bunch them up, they move close to each other so that they form a small tight group. Bunch together means the same as bunch up.
      

257、burden        
      If you describe a problem or a responsibility as a burden, you mean that it causes someone a lot of difficulty, worry, or hard work.
    

258、Burmese        
        Burmese means belonging or relating to Burma, or to its people, language, or culture. Burma is now known as Myanmar.
   

259、burn        

    If there is a fire or a flame somewhere, you say that there is a fire or flame burning there.
    

260、burn down            
            If a building burns down or if someone burns it down, it is completely destroyed by fire.