The chief lesson this teaches us is that making new equipment affordable has become a major problem in the research and development (R&D) process of any major new piece of military hardware.

这给我们的主要教训就是：能承受新装备的开销已成为研究开发军事新硬件设施过程中的主要问题。

youdao

Shnaider is still venturing into unknown territories, p.r. lesson or no, throwing money around and staring down rivals.

FORBES: Magazine Article

R. is a big piece to the puzzle and I hope he's learned his lesson, and we've got to move on with it and he's got to be ready to go tomorrow night.

WSJ: With Smith back, Knicks try again to oust Celtics