冰舞的缩写

有些冰舞的缩写看不明白，请教下：

• SR=Swing Roll 　－－对应动作是悠脚，不知道该叫什么．
• XR=Cross Roll 　－－前交叉的悠？
• Ch=Chasse 　　－－夏塞步＝垫步滑
• slCh=slide Chasse －－然后这个?
• Pr=Progressive or Run　－－这个呢？
• 还有 RF-TP, LF-TPCh,这样子

还有一些标旁边的拍子看不太明白...

• 不错的网站收藏:
  
  • COMPULSORY DANCE DESCRIPTIONS & PATTERNS http://www.ice-dance.com/reference/compulsories/
  • part of Ice Dance Patterns and video show on youtube  http://www.uq.net.au/~zzkelvin/coffeeskate/icedance.html

我只知道cross roll是交叉摇滚步～～～

shenshen找的：
Chasse是夏塞，浮足落冰时不超过滑足，叫垫步的话没问题
官方解释，摘自ISU rule 504：
Chasse - A step combination during which the free foot is placed beside the skating foot, but not ahead of it, with the new free foot leaving the ice beside the new skating foot.
a. Crossed Chasse - A chasse in which the free foot is placed on the ice crossed behind the skating foot when skating forward or crossed in front when skating backward.
b. Slide Chasse - A chasse in which the free foot slides off the ice in front when the skater is skating forward and behind when the skater is skating backward