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除非在这里修个水库，才能解决灌溉问题。
Only when a reservoir is built here can we solve our irrigation problem.
《新英汉大辞典》
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新建了一座水库，使80%的农田得以灌溉。
A new reservoir has been built to water 80 percent of the farmland.
youdao
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新建了一座水库，使80%的农田得以灌溉。
A new reservoir has been built to water 80 percent of the farmland.
youdao