There are many factors that influence the sampling error, such as, extent of mark variation, amount of sample unit and the choice of sampling method, etc.

影响抽样误差大小有很多因素，如标志变异程度，样本单位数量的多少，抽样方式方法的选择等。

youdao

We've done our best to translate the feel with our in-person photos of the pre-production sample unit here, but we'd say it's something we weren't able to fully appreciate ourselves until it was in the same room with us.

ENGADGET: People People AB's Transparent Speaker goes live on Kickstarter, we clearly go hands-on

So, Scout got upgraded from an 8-bit processor to a 32-bit unit based on Micrium, the operation system being used by NASA's Curiosity Rover for sample analysis on Mars.

ENGADGET