The rung of a ladder was never meant to rest upon, but only to hold a man's foot long enough to put the other somewat higher.
梯子上的横档从来不是用来休息的，只是为了在一只脚迈向更高处时，另一只脚可以有一个支撑。
The rung of a ladder was never meant to rest upon, but only to hold a man's foot long enough to put the other somewhat higher.
梯子的阶级绝非用以歇息，而是为了让人们在更上一层楼时，另一只脚可以有个稍高的落脚处。
Hold the ladder tightly and move up a rung at a time.
抓紧梯子一级一级地往上爬。
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