Today, I finally learned to slip roller skates, I am very happy, I finally learned to.
今天，我终于学会溜旱冰鞋了，我很快乐，我终于学会了。
This paper discusses the mechanisms of roller bearing slip and skidding damage, and describes different kinds of measures on skid prevention.
本文讨论了打滑及蹭伤的机理，阐述了不同类型的防滑措施。
This paper discusses the mechanisms of roller bearing slip and skidding damage, and describes different kinds of measures on skid prevention.
本文讨论了打滑及蹭伤的机理，阐述了不同类型的防滑措施。
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