森林保护向江河供应淡水的流域。
Forests protect watersheds which supply fresh water to rivers.
由于淡水供应充足，她活了下来。
如果有可怕的事故发生，无论是航线方面的问题，还是筏子或给养方面的问题，淡水供应是最关键的。
If something dreadful happened - to our course, our raft or our provisions - it is the water supply that would be most critical.
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