开始的时候，这是有利可图的交易，高回报，而且没有明显的风险。
At first it was a lucrative deal with high returns and little apparent risk.
很大程度上这项策略提供合理的回报，而且投资人每晚可安心入眠。
For the most part, this strategy offers sound gains while allowing investors to sleep soundly each night.
令人鼓舞的是，这些城市利用的大多数有创意的和实际的解决方案都是可承受的，并带来了经济回报，其中包括贫困人口获得的直接的和间接的好处。
What is encouraging is that most of the imaginative and practical solutions used by these cities are affordable and they generate economic returns, including direct and indirect benefits for the poor.
应用推荐