floating          
adjective [ before noun ] uk/ˈfləʊ.tɪŋ/ us/ˈfloʊ.t̬ɪŋ/
 流动的;浮动的
not fixed in one position, place, or level
  The city has a large floating population (= people who move around a lot). 这座城市有大量的流动人口。 
 The bank has offered us a loan with a floating interest rate. 这家银行向我们提供了浮动利率贷款。 
  medical specialized(身体部位)浮游的,浮动的,不在正常位置的 
used to refer to a part of the body that is out of its usual position, or not connected to another part of the body
  a floating rib 浮肋