不要承诺做不到的事，不过一旦承诺，就要守信。
Undertake not what you cannot perform but be careful to keep your promise.
售后服务方面：我们以先进的专业技术和优良的售后服务为客户解决一切后顾之忧，一旦承诺，终身相随。
After-sales service: we can solve all worries for customers with our advanced professional technology and excellent after-sales services, once committed, lifelong quest.
我们得修改这个实现，把它变成基于承诺的，并在承诺的事情被解决时再行动。 一旦承诺的事情被成功解决，我们就会显示英雄数据。
We have to change our implementation to act on the Promise when it resolves. When the Promise resolves successfully, then we will have heroes to display.
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