船只夜间航行所显示的两种灯中的一种，左舷为红色，右舷为绿色。
Nautical Either of two lights, red to port, green to starboard, shown by ships at night.
它还使用破冰船清除河流，湖泊中的冰，好让船只安全航行。
It also USES ice-breaking boats to clear ice from rivers or lakes, so boats can travel safely.
我们在这篇文章中探讨了如何利用这些照片来计算船只的航行速度。
We discuss how the images can be used to calculate the velocity of these ships.
洞穴中的一些剩余木材显示，每当船只经过数月航行最终返回时，它们会被送往洞穴进行拆卸，工人们检查船只各个部位的破损和断裂情况。
Timber remains at Wadi Gawasis demonstrate that when ships returned from several months at sea, they were disassembled in the caves, and the parts were inspected for wear and tear.
洞穴中的一些剩余木材显示，每当船只经过数月航行最终返回时，它们会被送往洞穴进行拆卸，工人们检查船只各个部位的破损和断裂情况。
Timber remains at Wadi Gawasis demonstrate that when ships returned from several months at sea, they were disassembled in the caves, and the parts were inspected for wear and tear.
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