Precondition : Ella is 1 year and 17 days old. She can crawl on four, climb stairs, cruise. She is ready to prepare for her first step.

目前状况：语柔1岁17天大，能够爬地和楼梯，能够扶着沙发横着走几步，可以开始为她迈第一步做准备了。

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Even worse, when they decided to give that up and were ready to return, they found they had forgotten how they had walked before. As a result, they had to crawl back home.

更糟的是，当他们决定不学了，准备回家的时候，却发现把自己原来走路的方式都忘了，只好爬着回去。

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