sapping
n.
基蝕；挖掘；下切
動詞sap的現在分詞形式.
英語翻譯 名詞 sap:
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a watery solution of sugars, salts, and minerals that circulates through the vascular system of a plant
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a person who lacks good judgment
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a piece of metal covered by leather with a flexible handle; used for hitting people
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