Translating the underlined English sentence into Chinese
Possession for its own sake or in competition with the rest of the neighborhood would have been Thoreau’s idea of the low levels. The active discipline of heightening one’s perception of what is enduring in nature would have been his idea of the high. What he saved from the low was time and effort he could spend on the high. Thoreau certainly disapproved of starvation, but he would put into feeding himself only as much effort as would keep him functioning for more important efforts.
Effort is the gist of it. There is no happiness except as we take on life-engaging difficulties. Short of the impossible, as Yeats put it, the satisfaction we get from a lifetime depends on how high we choose our difficulties. Robert Frost was thinking in something like the same terms when he spoke of “The pleasure of taking pains”. The mortal flaw in the advertised version of happiness is in the fact that it purports to be effortless.
We demand difficulty even in our games. We demand it because without difficulty there can be no game. A game is a way of making something hard for the fun of it. The rules of the game are an arbitrary imposition of difficulty. When someone ruins the fun, he always does so by refusing to play by the rules. It is easier to win at chess if you are free, at your pleasure, to change the wholly arbitrary rules, but the fun is in winning within the rules. No difficulty, no fun.
梭罗所理解的“低层次”，即为了拥有而去拥有，或与所有的邻居明争暗斗 而致拥有。他心目中的\"高层次\"，则是这样一种积极的人生戒律，即要使自己对自然界永恒 之物的感悟臻于完美。对于他从低层次上节省下来的时间和精力，他可将其致力于对高层次 的追求。勿庸置疑，梭罗不赞成忍饥挨饿，但他在膳食方面所投入的精力仅果腹而已，只要 可确保他能去从事更为重要的事务，他便别无所求。
努力是问题的关键。如果不经历艰难困苦，就没有幸福可言。正如爱尔兰诗人叶芝所言，除了极少数不大可能出现的情况外，我们一生中得到的满意程度取决于我们愿意克服的困难有多大。美国诗人罗伯特费罗斯特谈到“苦中求乐”时，也表达了相同的看法。出现在广告中的幸福都有一个致命的错误，那就是，不费吹灰之力即可获得幸福。
即使在体育比赛中，我们也需要克服困难。我们需要克服困难，因为没有困难就没有比赛。比赛就是使某件事情变得更加困难，以便难中取乐。制定比赛规则就是故意制造困难。违反竞赛规则也就丧失了比赛乐趣。下棋时，如果不受规则的约束，高兴怎么走就怎么走，你很容易取胜。然而，乐趣源于胜利而又遵守规则。没有困难，也就没有乐趣。
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