This article provides a complete design and control method according to the theory calculate and analyse of experiments. It is useful to improve the research about alternative pressure test.

本文通过理论分析计算，结合多次的实验结果，对该方面的设计提出一套比较完整的设计和控制方案，对今后类似试验技术的研究开发具有良好的借鉴作用。

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In offering an alternative to these services, Facebook is ramping up pressure on its rivals.

在提供这些服务的替代品时，脸谱正在加强它对其竞争对手的压力。

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An asynchronous function is often slower than its synchronous alternative and unless care is taken it can also add significant memory pressure.

异步函数往往比其同步替代方案稍慢一些，而且如果您不介意采用它还会增加相当大的内存压力的话。

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In this analysis, we examined the dual threat of alternative platform adoption and competitor pricing pressure, and also mentioned the potential for increased marketing spending.

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But an alternative to the high-stakes pressure may be to consider taking a gap year, time off before college designed to be a break from academics, for personal growth, travel, or to participate in community service or internships.

FORBES: Take a Gap Year, With Your College's Blessing

"Despite enormous advances for women and girls in education since 1972, schools across the country continue to bar pregnant and parenting students from activities, kick them out of school, pressure them to attend alternative programmes, and penalise them for pregnancy-related absences, " the centre said in the report.

BBC: US school ends classroom ban on pregnant students