There are three main types of contract(s).

有三种主要的合同。

《牛津词典》

Descriptions and Specifications of goods filed herein shall correspond with those in the L/C(s)and contract(S).

商品名称及规格：按信用证合同上所列名称及规格填写。

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So, the treatment of labor contract 's valid factors, sanction, invalid effects should have a different criterion from the common civil contract.

因此，劳动合同的有效要件、约束力、无效后果的处理必须有著不同于普通民事合同的特殊规范。

youdao

So, the treatment of labor contract 's valid factors, sanction, invalid effects should have a different criterion from the common civil contract.

因此，劳动合同的有效要件、约束力、无效后果的处理必须有著不同于普通民事合同的特殊规范。

youdao