slider  
noun [ C ] uk/ˈslaɪ.dər/ us/-dɚ/
  (ON MACHINE)      
  (仪器上用来进行控制的)滑标
a part on a machine, computer, etc. that is used to control something, for example the volume that something is played at
  These videos all have a volume slider. 这些视频都带有音量控制滑标。 
   (SHOE)      
  [ usually plural ] UK (US slide)凉鞋 
a type of open shoe that you can slide your foot into, with one or more bands across the top of the foot
  a pair of sliders for summer 夏天穿的凉鞋 
   (FOOD)      
 mainly US(用作点心或饭前食用的)小三明治,(尤指)小汉堡包 
a type of small sandwich, especially a small hamburger, served as a snack or at the start of a meal
  pork sliders 猪肉馅小三明治