“dry valley”的概念、定义、翻译、参考文献-科学参考

单词	dry valley
释义	dry valley [¦drī `val·ē] ^GEOLOGY A valley, usually in a chalk or karst type of topography, that has no permanent water course along the valley floor.
随便看	plow plowshare plow sole plow steel plow wind plucking plug plug adapter lamp holder plug-and-feather hole plug-and-feather method plug back plug bit plugboard plugboard chart plug cock plug-compatible hardware plug cutter plug die plug dome plug drawing plug flow plug forming plug fuse plug gage plugging

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