溪水绕过石头时打个结，解开后又往下淌

溪水从上游冲下来，哗哗的，急急的，像一群放学的小孩。前面有块石头，圆滚滚的，青灰色的，半截埋在沙里，半截露在水面上。溪水到了石头跟前，分成了两股——一股从左边绕，一股从右边绕。绕过去之后，两股水又碰到了一起，但它们没有简单地合流，而是打了个结——左边的水往右拐，右边的水往左拐，交叉在一起，转了一个圈，像打了一个活结。那个结圆圆的，慢慢的，水在里面转着，像一根绳子被拧了一下。结打好了，水好像松了一口气，又解开了——不是一下子解开，是慢慢地松开，一圈一圈地散，像一个人慢慢地解开鞋带。解开之后，水又恢复了原来的样子，合在一起，哗哗地往下淌，像什么都没发生过。石头还在那里，等着下一股水来，再打个结，再解开，再送走。千百年来，它已经习惯了，习惯被水绕过去，习惯看水打结，习惯看水解开，然后目送它们往下淌。

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