翻译：
Zheng He was the most famous maritime explorer in Chinese history. In 1405 AD, the ruler of the Ming Dynasty sent Zheng He on a voyage to the Western Seas in order to strengthen border defense and develop trade by sea.
扩展资料：
重点词汇
1、maritime
英 [?m?r?ta?m] 美 [?m?rta?m]
adj.海事的；海运的；海的；船舶的
例句：The?balance?of?maritime?superiority?has?tipped?in?favor?of?us.?
译文：海上优势已经转到我们这边了。
2、voyage
英 [?v?d?] 美 [?v?d?]
n.旅程；旅行，航海，航空；远行
例句：He?aims?to?follow?Columbus's?voyage?to?the?West?Indies.?
译文：他打算重走哥伦布到达西印度群岛的航行路线。
3、defense
英 [d?'fens] 美 [df?ns]
n.（美国）国防部，防卫，防卫物
例句：The?Defense?Secretary?gave?an?upbeat?assessment?of?the?war?so?far 。
译文：国防部长对目前的战事给予了乐观的评价。