《明史·志·卷六十三》
并且起龄木乐店到达飞云桥，占地以千里计算，需用役夫上百万，累积工夫十年，不能确保它的成功。
且起木栾店至飞云桥，地以千里计，用夫百万，积功十年，未能必其成也。
Besides, from Muleshop to Feiyun Bridge, it would take up hundreds of thousands of square miles, require millions of laborers, and take ten years to complete, without any guarantee of success.
<s>[INST] Kindly elucidate the central themes in this passage in English: 且起木栾店至飞云桥，地以千里计，用夫百万，积功十年，未能必其成也。 [/INST] Besides, from Muleshop to Feiyun Bridge, it would take up hundreds of thousands of square miles, require millions of laborers, and take ten years to complete, without any guarantee of success.</s>
Kindly elucidate the central themes in this passage in English: 且起木栾店至飞云桥，地以千里计，用夫百万，积功十年，未能必其成也。
user
Besides, from Muleshop to Feiyun Bridge, it would take up hundreds of thousands of square miles, require millions of laborers, and take ten years to complete, without any guarantee of success.
assistant