piste basher       
noun [ C ] UK informal uk/ˈpiːst ˌbæʃ.ər/ /ˈpiːst ˌbæʃ.ɚ/
 (用于平整雪道的)压雪机
a large vehicle used on ski slopes to make the snow smooth and ready for skiing on
  Don't expect smooth runs. Piste bashers are rare here. 就别指望有平稳滑行了。这里几乎没有压雪机。 
 Between races, a snow plough and piste basher treated the track. 在比赛间歇,雪犁和压雪机对赛道进行了处理。 
 See also: snow groomer
 - More examples
 - The piste bashers had been at work all night, shovelling every last flake into a single strip in a valiant attempt to keep lessons running.
 - Robbins admits that flying regularly to resorts where huge piste bashers guzzle diesel all night is tough to justify.
 - With the snow continuing to come down, even after the piste basher had smoothed everything, there was a lovely layer of fresh fluff sitting on top of the corduroy.