为保证出使诏谕海外诸国海船的供应，明成祖即位初期，就命各大造船厂建造大批海船。
To ensure the use of ships for his special envoys, Emperor Yongle also ordered all ship manufacturers to be engaged in ship building.
为保证出使诏谕海外诸国海船的供应，明成祖即位初期，就命各大造船厂建造大批海船。
To ensure the use of ships for his special envoys, Emperor Yongle also ordered all ship manufacturers to be engaged in ship building.
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