The last step in the preparation phase is to create a sample activation profile for the virtual image.

准备阶段中的最后一个步骤是为虚拟映像创建示例激活配置文件。

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Methods should be fast (giving results in minutes or hours), require minimal sample preparation before analysis, and be low in cost.

方法应该迅速(在数分钟或数小时内可以得到结果)，样品制备需要量最低，和较低成本。

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However, it may arise from an artifact during sample preparation.

然而，样品制备过程中可能带入人为的物质。

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The simple and inexpensive devices require minimal training to use, practically no sample preparation, and no electricity or additional equipment to process a sample.

UNESCO: House | United Nations Educational, Scientific and Cultural Organization

Fly-catchers usually work 12-hour shifts, alternating catching and sample preparation.

BBC: Burkina Faso: Beating river blindness by fly-catching