1. 美劲儿
1. 工作之后，听点儿好音乐，那个美劲儿就别提啦。
What a delight it is to listen to some good music after work.
2. 大灰熊不厌其烦地一遍又一遍地爬上雪坡，就是为了享受刺溜溜地滑下来的那股美劲儿。
A grizzly will climb to the top of a good snow slope again and again just for the joy of whizzing down it.
3. 美劲儿的解释
3. 瞧他这美劲儿。
Look how delighted he is!