If all difficulties were known at the outset of a long journey, most of us would never start out at all.
如果在长途旅行的开始就知道所有的困难，我们大多数人就永远不会出发了。
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Journey
如果在长途旅行的开始就知道所有的困难，我们大多数人就永远不会出发了。