从卫星系统的角度看，主要风险在于变轨能否精确和迅速地完成。

Judging from the satellite system, the major risk is whether the orbit changes can be completed precisely and promptly.

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他用手在铁管上迅速地摸一下看它是否太烫，然后才抓住它。

He ran his hand over the pipe to see if it was hot before grabbing it.

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马克斯韦尔迅速地问道，回头看了看自己桌上的电话。

Maxwell asked quickly, looking back at the phone on his desk.

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