seamless  
adjective uk/ˈsiːm.ləs/ us/ˈsiːm.ləs/
  (CLOTHES)      
  无缝的
without any seams (= lines of sewing joining different pieces of cloth)
  seamless stockings/tights 无缝长袜/紧身衣 
   (WITHOUT STOPPING)      
 顺利的;连续的
happening without any sudden changes, interruption, or difficulty
  The intention is to achieve a seamless transition with a continuity of management. 目地是通过保持管理层连续性实现顺利的转变。