我三岁时就开始学溜冰了。
刚开始学溜冰时，我小心翼翼的拉住妈妈不敢放手，学了两个晚上我一咬牙松开妈妈的手居然没摔倒。
Just started to learn skating, I am cautious not free to draw his mother, I learned two nights a teether release did not surprise the hands of Mama fall.
设计了溜冰机器人运动学状态空间表达式和运动学控制方程。
The kinematic state space representation and its corresponding control equation of the ice skater robot were presented.
这样，我们便得出了一个被戏称为RRR的严肃的生物学悖论：大自然未能产生出有可伸缩的滑轮溜冰鞋的老鼠。
We thus arrive at the serious biological paradox flippantly termed the RRR dilemma: nature's failure to produce rats with retractable roller skates.
这样，我们便得出了一个被戏称为RRR的严肃的生物学悖论：大自然未能产生出有可伸缩的滑轮溜冰鞋的老鼠。
We thus arrive at the serious biological paradox flippantly termed the RRR dilemma: nature's failure to produce rats with retractable roller skates.
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