It's a tried and tested method that has existed for over a century.

这种方法已经历经多次考验，一个多世纪前就出现了。

It's a clean, elegant, tried and tested  solution.

这是一个干净、优雅、久经考验的解决方案。

Maybe something tried and tested, like three, seven or 10.

也许是经过尝试和测试的东西， 比如三个、七个或 10 个。

Yes, definitely. It is tried and tested.

是的 当然 此方法已经过测试。

You see, when it comes to innovating and energy, the West is working around the edges of a system that is tried and tested.

当谈到创新与能源时，西方正在研究一个尝试过和测试过的体系的边缘。

Levers that are tried and tested to help us work on the transition, policy and advocacy, to name just a few.

仅举几例，经过尝试和测试可以帮助我们开展过渡、政策和宣传工作的杠杆。

" Abbas is a tried and tested figure, a figure that the Israelis can do business with. And therefore, again, they need to do business fairly quickly within this time frame, " he said.

阿巴斯是可靠的经过考验的人物，以色列可以与他进行谈判。因此，他们需要在这个时间框架之内尽快公平谈判。