也有些城市拥有宏伟的措施，它们有灌溉系统，水从城中流过，那为什么崩溃了呢？
These were great cities with grand steps. They had irrigation, water flowing through the city, so why did it collapse?
也有些城市拥有宏伟的措施，它们有灌溉系统，水从城中流过，那为什么崩溃了呢？
These were great cities with grand steps. They had irrigation water flowing through the city so why did it collapse?
还有，这里有许多古树，水泥的碱会损坏这些它们，我们不得不安装一个特殊的灌溉系统。
Also there are many ancient trees, which would have been damaged by the alkali from the cement. We have had to install a special irrigation system.
还有，这里有许多古树，水泥的碱会损坏这些它们，我们不得不安装一个特殊的灌溉系统。
Also there are many ancient trees, which would have been damaged by the alkali from the cement. We have had to install a special irrigation system.
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