yield curve question question

sky825cn

 a steepening of the yield curve can increase the yield on long-term bond but leave the yield on short-term bond unchanged.
请问这句话如何理解？？？
如果是yield curve steepening, 应该是未来的interest rate rises faster than the current interest rate.
但是bond yield怎么可以increase呢？ 我只想到了floating rate解释。

请问对这句话的全面解释是什么？ 谢谢

haochao

 .....The curve can get steepen in response to higher expected inflation in the future; 總覺得句子說反了。。
     a steepening of the yield curve應該會讓Fed to change(cut) the short-term rate and leave LT rate unchanged吧。。 during economy downtown;