The only way he'll succeed is by the sweat of his brow.
自己辛勤付出是获得成功的唯一途径。
By the sweat of his brow he reaped the fruits of his Labour.
通过滴撒汗水的辛勤劳作，农民收获了他劳动的果实。
It is not necessary that a man should earn his living by the sweat of his brow, unless he sweats easier than I do.
流汗劳动来养活自己，并不是必要的，除非他比我还要容易流汗。
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