The best of plans must have a solid foundation before execution can commence .

最妥善的计划在开始前，必须具有坚实的基础。

Even if you think you already have a solid foundation and you have work, set aside enough time so that you can still do all of the above on the side.

即使你认为自己的基础已经很扎实了，或者已经有工作了，也要尽量抽取时间做这些。

Cao Lei said, from paper to a depth of renewable energy, not only requires a lot of money, but also have a solid foundation to support research.

曹振雷说，从造纸深入到可再生能源，不但需要投入大量的资金，也要有扎实的基础研究来支撑。

Every economist needs to have a solid foundation in the basics of economic theory and econometrics, even if you are not going to be either a theorist or an econometrician .

即便你不想成为经济理论学家或者计量经济学家，每一个经济学家都需要有一个扎实的经济学原理和计量经济学的基础。