Keeping the sea ice intact also ensures the survival of species elsewhere.

保持海冰完整还可以确保其他地方物种的生存。

They have a shared interest with Vietnam in keeping the sea lanes open.”

在保持海上通道畅通方面，他们与越南有着共同的利益。”

But because of the hinges, it will assume 50 degree position, keeping the sea higher and the lagoon at the lower level.

但是，由于铰链的作用，闸门会保持在 50 度的位置，使海水保持在较高的位置，泻湖保持在较低的位置。

They would also work to develop a code of conduct that aims to set rules to keep the sea safe for shipping.

同时也致力于制定一套行为准则，为航海安全保驾护航。

The roman legal system ensured the rule of law, the roman army kept the borders safe from marauders and the roman navy kept the seas free from pirates.

罗马的法制体系确保了依法治国，罗马军队保护边境地区不受掳掠者侵袭，罗马海军则保护海洋不受海盗袭击。