In the ways to alleviate municipal water shortage, municipal sewage reuse may open the second water source, it is easier implement and more economical than other ways.
在缓解城市缺水问题上，城市污水回用可开辟城市第二水源，比其他开源节流途径在实际中更容易实施，更经济。
Stefan problem of ice-water mixture is discussed under the condition of the second boundary and heat source accelerating to melt ice.
讨论在第二边界条件和有热源加速冰融化情况下冰水混合物自由边界问题。
The most famous Daquan Lake has its source in Sangu spring — the first spring of Cathay, its flow amounts to 7.3 cubic meters per second, water being clean and refreshing sweet.
青天河园区最著名的大泉湖发源于号称“华夏第一泉”的三姑泉，该泉流量高达每秒7.3立方米，水质清冽，甘甜爽口。
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