The set of limitations within which a technological system, especially an aircraft, can perform safely and effectively.

技术系统，尤其是飞机，能够安全有效运转的一系列界限。

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Firemen know how to perform rescues safely.

消防队员知道如何安全地进行救援。

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Then he fired up the jets on his new, smaller and sleeker, wingsuit to perform the loopings before landing safely with a parachute

接着他打着了装在他新的更为小巧光滑的滑翔翼上的喷气推进器，表演了两个冲浪空翻之后用降落伞安全着陆。

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Realizing this potential will require partnerships between industry and government to develop a framework and best practices for cyber-physical-systems platform technologies that include integrated architectures, standards and protocols, advanced analytics, evaluation testbeds, and reference implementations to ensure such systems perform reliably, correctly, safely and securely.

WHITEHOUSE: Presidential Innovation Fellows

Regarding the capability of the blind, I believe that with the right nonvisual user interfaces, once we can deliver all the information needed to safely operate the vehicle to the driver, the blind can perform as well as, or possibly even better than the sighted.

CNN: Why we made a car for blind drivers

Once safely on the planet's surface, more patience is required as the rover has to perform health checks and assess its tilt before it can tackle the fun part of roving the landscape looking for samples.

ENGADGET: Life on Mars: One week of Curiosity Alt