The normal no-traffic line condition in which a steady space is transmitted ; it may be a customer selectable option.

正常的空闲线路状态，在这种状态下，传输的是稳定的空号信号，是用户可以选择的一种线路状态。

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Qinhuangdao stadium roof system is composed of 24 cantilever trusses. The truss, arc beams and cables form together a steady space system.

秦皇岛体育场屋盖由24榀悬臂桁架组成，桁架之间以弧形拱梁和钢索连接为空间稳定体系。

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And besides, in the 54-year history of the space age, no one has ever been hit by falling debris, despite a steady rain of satellites and rocket bodies.

除此之外，在五十四年的太空探索历史中，还没有人被卫星掉落的残骸击中或击伤过，就算算上卫星雨和火箭推进器也是如此。

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While the subsea market has traditionally been serviced by small and specialized firms, Schlumberger has been making steady inroads into this space.

FORBES: What The Cameron Subsea Deal Could Mean For Schlumberger

Worries in America are likely to grow if China's space programme keeps up its steady pace of development.

ECONOMIST: After a successful Olympics, China��s next spectacular

Steady electronic "heartbeat" tones relayed from Curiosity across space to Earth indicated a successful landing to the control room at Jet Propulsion Laboratory.

WSJ: NASA's Curiosity Rover Lands on Mars