Similar machines have flown in space aboard NASA's shuttles, but they couldn't be tested for long enough to prove whether they were effective.
类似的机器也曾搭乘美国宇航局的航天飞机在太空中飞行，但无法进行时间足够长的测试来证明它们是否有效。
The Long march is a march that tests truth. Truth must be tested in practice and can only be established in practice.
长征是一次检验真理的伟大远征。真理只有在实践中才能得到检验，真理只有在实践中才能得到确立。
The 56-meter-long jet will be tested at five airports, including Osaka’s Kansai and Hiroshima during its six-day itinerary in Japan, according to news reports.
据新闻报道，在日本为期6天的行程中，这架长达56米的喷气式飞机将分别在5个机场进行试飞，包括大阪的关西国际机场和广岛机场。
But materials that have negative refractive indices have already been made (at least for light with wavelengths that are too long to be visible), so the idea could be tested fairly easily.
但是，具有正折射指数的材料已经被制作出来(至少用于对那些具有大波长而无法看到的光进行试验的材料已经制作出)，因此这种构想的试验不会大费周折。
One long-term relationship may be tested - if it is strong it will survive, but if the relationship is weak or marginal it might not.
一段长期的关系可能会被测试，它可以存活下来如果它够强的话，如果这段关系只是段很弱小的关系，那么它将会不复存在了。
Often, when a hypothesis has to be tested, there is a long deductive journey from the hypothesis to some consequence that can be tested by observation.
当一个假说必须验证时，从这假说到某个能由观察来验证的结论，往往有一段漫长的演绎程序。
Conclusion: CST can be tested for intermediate and long distance.
结论：CST可以检查中远距离立体视功能。
But empirical research is limited to the country's 21 major cities, the sample time span long enough, conclusion of the study the reliability and universal yet to be tested.
但实证研究仅限于全国21个重点城市，样本的时间跨度也不够长，研究结论的可靠性和普遍性还有待检验。
The results tested the pest data showed that the new method may be tried for the mid term or long term forecasting of the population dynamics of insect pests, and it is a good model for application.
研究结果表明，该预测模型为农业害虫种群动态的中长期预测预报提供了一种新的研究方法，是一种优良的模型。
Be tested by long term, solid and practical the latest mechanics designs.
经长期测试，坚固实用，最新力学设计。
The 56-meter-long jet will be tested at five airports, including Osaka's Kansai and Hiroshima during its six-day itinerary in Japan, according to news reports.
据新闻报道，在日本为期 6 天的行程中，这架长达 56 米 的喷气式飞机将分别在5 个机场进行试飞，包括大阪的关西国际机场和广岛机场。
The 56-meter-long jet will be tested at five airports, including Osaka's Kansai and Hiroshima during its six-day itinerary in Japan, according to news reports.
据新闻报道，在日本为期 6 天的行程中，这架长达 56 米 的喷气式飞机将分别在5 个机场进行试飞，包括大阪的关西国际机场和广岛机场。
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