雖然小型企業維持困難，但比起其他大城市有較有效的大公司在這裡成功率較高

雖然小型企業維持困難，但比起其他大城市有較有效的大公司在這裡成功率較高

結果 (英文) 1:

Although it is difficult for small businesses to maintain, there are more effective large companies here than in other large cities with a higher success rate

結果 (英文) 2:

Although it is difficult for small enterprises to maintain, compared with other big cities, there are more effective large companies with a higher success rate here

結果 (英文) 3:

Although small businesses are difficult to maintain, they have a higher success rate here than large companies that are more effective than other large cities