All times and in all, the discovery of all truth, all from the "suspect" in the beginning. As we all know, Galileo is due to the maintenance of the more than two thousand years Aristotle on the stones, feathers doubt the fate of the conversation, and after repeated experiments, before coming to the severity of different objects fall at the same time the correct conclusion of. It can be said that there is no "suspect", there would be no truth, there would be no progress of human civilization.
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Animal experiments by psychologists at the University of Pennsylvania had shown that after repeated failures, most animals conclude that a situation is hopeless and beyond their control.
宾夕法尼亚大学的心理学家进行的动物实验表明，在多次失败之后，大多数动物都会作出这样的结论：情况已无可救药，超出了它们的控制范围。
This lamp was successfully produced after repeated studies and experiments.
这种灯是经过反复研究和试验后制成的。
After repeated experiments, the waveform display to select the best program, while paper also described and solved the various problems encountered in practice.
经多次实验比较，制定出最佳的波形显示效果方案，同时论文也阐述并解决了实际中遇到的各种问题。
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