单词	Douro
释义	Douro geographical name Dou·​ro ˈdȯr-(ˌ)ü  variants or Spanish Duero ˈdwā-rō  river 556 miles (895 kilometers) long in southwestern Europe rising in north central Spain, flowing west to northeastern Portugal, turning south where it forms a section of the border between Spain and Portugal, then flowing west into the Atlantic
随便看	improve on improve on/upon improve upon improved improved cylinder improved on improved upon improved wood improvement improvement factor improvements improvements and betterments insurance improver improvers improves improves on improves upon improvidence improvidences improvident improvidentially improvidently improving improving on improving upon

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