北宋时代，指南针利用于航海事业中，使之有了经久不衰的性命力。
The Northern Song Dynasty time, the compass applies in the navigation enterprise, enabled it to have the unfailing vitality.
我有一位朋友，来自本地一所具有悠久华族传统的名校，兴奋地告诉我，原来中国明朝航海事业是如此发达。
A friend of mine, who came from a prestigious school with a strong Chinese tradition here, once told me excitedly that China's Marine industry was already well-developed during the Ming Dynasty.
在现代航海事业中，安全可靠的通信技术是船舶安全航行和海上生命安全的重要保障，具有重要的研究意义。
In the modern maritime career, safe and reliable communication technology is an important guarantee of the safe voyage and the safety of life at sea, so it has important research significance.
在现代航海事业中，安全可靠的通信技术是船舶安全航行和海上生命安全的重要保障，具有重要的研究意义。
In the modern maritime career, safe and reliable communication technology is an important guarantee of the safe voyage and the safety of life at sea, so it has important research significance.
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