This allows for relatively thinner walls and componentry that isn't subject to such high stress.

所以它可以有相对较薄的壁和组件不受如此高的应力。

I believe there are upwards of 3mn people working in some fashion on the componentry and the assembly and manufacture of Apple's products.

我相信有超过 300 万人以某种方式从事 Apple 产品的组件、组装和制造工作。

Due to the greater stresses required and generated in the combustion of diesel, it is essential for their engines to have thicker walls and a better quality of componentry.

由于在柴油燃烧过程中需要和产生更大的应力，因此它们的发动机必须具有更厚的壁和更好的组件质量。