Autonomous spending is the amount of demand that an economy will have with no income, in other words, that does not depend on income.

自发支出是一个经济体在美有收入时的需求量，也就是是说它并不依赖于收入。

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Since the demand for autonomous underwater vehicle (auv) "s voyage ability has improved, how to solve the navigation precision has became a key problem".

随着对自主水下机器人远距离航行能力要求的不断提高，如何提高水下机器人长航导航精度成为亟待解决的问题。

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On the demand of autonomous quality, concealment and higher precision of underwater vehicle, navigation system must take INS as the core and be assisted by other navigation systems.

水下潜器自主性、隐蔽性和高精度的要求，决定了导航系统必须是以惯性导航为核心，辅之以其他导航系统的组合导航系统。

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