Work out the exact design before you start construction.

【construction】开始施工之前要先搞好具体的设计。

There is no working design for the EmDrive, but NASA has built and experimented with several prototypes.

EmDrive 没有可行的设计，但 NASA 已经建造并试验了几个原型。

The reason these questions are so hard to answeris because we're thinking about hybrid work design as a single problem.

这些问题之所以如此难以回答，是因为我们将混合工作设计视为一个单一问题。

So Bertozzi built on the foundations of Sharpless and Meldal's work, designing a copperless " way of using click chemistry with biological systems without killing them" , Diez-Gonzalez said.

迪兹-冈萨雷斯说，因此贝尔托齐建立在夏普勒斯和梅尔达尔工作的基础上，设计了一种无铜的“在不影响细胞或生物活体的情况下使用点击化学的方法”。

She had a light complexion, large and peaceful eyes, and magical hands that seemed to work out the design of the embroidery with invisible threads.

她有着白皙的肤色，一双平静的大眼睛，一双神奇的手，仿佛用无形的线织出了刺绣的图案。