这次研究并不能证明什么疗效，因参与者们只被评估了一次而不是多次反复地被评估，他说到。
The study can't prove an effect because the participants were evaluated only once rather than repeatedly over time, he said.
“我们的工程师们已经反复多次测试过这支广告，去除了所有的程序错误，我们可以骄傲地对这支广告的软件质量打保票，”麦臣女士发誓说。
"Our engineers have repeatedly tested this commercial to work out all the bugs, and we proudly stand behind this advertisement," Machen said.
过去几周时间里，我不停地把这些观念反复想了很多次。
Over the past few weeks, I've found myself thinking of this notion again and again. He writes.
他打开皮夹，小心翼翼地拿出两张用旧的笔记本纸，它们明显地被用绳子捆扎过，并且反复折叠了多次。
Opening the billfold, he carefully removed two worn pieces of notebook paper that had obviously been taped, folded and refolded many times.
在本周三的《自然》期刊上所介绍得这种材料能够反复多次地断裂并再行修复。
The material, described on Wednesday in the journal Nature, can be broken and repaired over and over again.
在本周三的《自然》期刊上所介绍得这种材料能够反复多次地断裂并再行修复。
The material, described on Wednesday in the journal Nature, can be broken and repaired over and over again.
应用推荐