题目内容
很多船舶上的全封闭式救生艇均采用设在船尾的________，这样使用更加方便、安全. The fully enclosed lifeboats on ships use a_____ at the stern, which makes it more convenient and safe.
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________是在开敞式救生艇基础上加设刚性的封闭顶盖，以保护乘员不受冷热侵袭。 ______is a rigid enclosed roof attached to the open lifeboat to protect the occupants from cold and heat.
郑和下西洋，比其他国家的航海家早了近千年。Zheng He’s navigation was nearly a hundred years earlier than the navigators of other countries.
中华祖先的航海活动早在新石器时代就已经开始了。The maritime activities of our Chinese ancestors began early in the Neolithic Age.
哥伦布最终到达了印度群岛和日本。Columbus has reached the “Indian Islands” and “Japan” in the end.
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