经过十年的努力，1967年6月，他设法攒够了钱，开了我们的第一家比萨饼店。

After ten years of hard work, in June 1967, he managed to save enough and opened our first pizzeria.

youdao

经过多年的努力，我们终于解决了这个难题。

We have solved the problem after many years' hard work.

youdao

经过30年的努力，我们已经部署了一套控制人口的系统方案。

Over 30 years of effort, we have put in place a systematic procedure for controlling the population.

youdao