The Americans or the Germans, a contract is signed the future we must observe things, it means that the signature can not be changed is finalized.

对美国人或德国人来说，合同是一种签了字以后就必须遵守的东西，签字就意味着是定稿不能再变。

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Once a contract between Labour and capital is concluded, the workers must observe Labour discipline and the capitalists must be allowed to make some profit.

劳资间在订立契约后，工人必须遵守劳动纪律，必须使资本家有利可图。

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The professional athlete are those who must observe the required rigorous treaty when they sign the contract and serve for the clubs, besides taking a generous sum of annual salary.

欧美国家的职业运动员在俱乐部里签约服役，除了拿丰厚的年薪外，还得遵守苛刻的限定条约。

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