By testing and analyzing the sample tubes.

通过对实验样管的测试与分析。

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Sure, there are other ways to gather feedback, such as usability testing and analyzing traffic to your help servers.

当然啦，还有其他方法也可以收集反馈意见，例如可用性测试以及分析公司帮助文档网站的访问流量。

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A general vibration signal testing and analyzing system for rotating machine is developed based on the methods.

在此基础上研制一套通用性旋转机械振动信号测试与分析系统。

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Working in my garage, I custom built a mosquito test chamber, created artificial perspiration with varied concentrations of ingredients, and after innumerable hours of testing and analyzing data, was able to discover the role of ammonia in the attraction of mosquitoes to humans.

FORBES: Mosquitoes And Malaria In India Are No Match For This Teen Girl Scientist

Bosse points to a study conducted by the Plan for Analyzing and Testing Hypotheses, a 25-member group of biologists, engineers and statisticians representing federal entities, states and tribes, that compared upriver stocks of salmon to downriver socks.

CNN: Dam removal: Too little, too late for salmon?