A liquid ventilator that can do this has never gotten past the prototype stage.

能够做到这一点的液体呼吸机从未通过原型阶段。

The findings are promising, but the technology has yet to advance beyond the prototype stage.

这些发现令人鼓舞，但该技术尚未突破原型阶段。

Starship is a fully reusable, super heavy lift vehicle that has been under development since 2018, still in the prototype stage as of today.

星际飞船是一种完全可重复使用的超重型运载工具，自 2018 年以来一直在开发中，时至今日仍处于雏形阶段。

The material, called Quantum Stealth, is currently still in the prototyping stage, but was developed by the company's CEO Guy Cramer primarily for military purposes, to conceal agents and equipment such as tanks and jets in the field.

这种被称为" 量子隐形" 的材料目前还处于原型设计阶段，但这种技术原先是公司CEO盖伊·克莱默研发用作军事用途的，用以在战场中隐藏特工以及坦克、飞机这样的武器。