他们的主要职责是确保船舶航行及其他海事活动的安全，遇有紧急事故则立即动员应变。
Their main duties are to ensure safety of navigation and other Marine activities as well as to respond to emergencies.
随着国际贸易和航运事业的日益繁荣，船员作为主要海事力量，在海事活动中起着越来越重要的作用。
With the flourishing of international trade and shipping business, seafarers, as the main maritime force, play a more and more important role in maritime activities.
现代社会，航运已经成为国际贸易的最重要渠道，而海事公约在规范海事活动方面起着至关重要的作用。
In modern society, shipping has become the most important way in world-wide trades and communications, and maritime conventions play a crucial role in regulating and standardizing maritime activities.
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