The contract performance covers a 6 month base period with four one-year option periods.

合同日期包括6个月的基本期和四个为期一年的选择期。

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The one-year contract has four option years.

该项合同为期一年。

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Option 1: Simple four-table schema.

选项1：简单的4表模式。

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There is also another option to add four N to 7 mm adapter.

也存在另一种选择添加四个N型到7毫米适配器。

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Finally, the option of a four-day workweek would be better for individual employees.

最后，这种四天工作日的选择对于员工个人来说也是有利的。

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Then, set up the four-digit PIN on the option below.

然后，设置下面的选项四位数pin。

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Then, set up the four-digit PIN on the option below.

然后，设置下面的选项四位数pin。

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