与之相反，许多科技类工作通常在相对真空的环境下进行，与最终用户完全脱节。
Many tech jobs, by contrast, are carried out in a relative vacuum, disconnected from the end-user.
狭义相对论也奠基于它的第二个假设：他所设定的真空中光速为每秒186,000英里(每秒300,000千米)有它的特殊地位。
Special relativity is also based on a second assumption that gives the speed of light - 186, 000 miles per second (300 million meters per second) - in a vacuum a special status.
相对于使用高真空度机器进行固态电池的生产，平面能源公司的新工艺有望将主要生产成本减半。
Planar Energy expects to reduce capital costs by half compared with solid-state battery manufacturing using high-vacuum machinery.
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