buckling down is buckle down's Present Participle

buckle down

Simple Present：buckles down Present Participle：buckling down Past Tense：buckled down

E-E

na.	1. to start working hard and seriously

Definition:

AllAll,开始努力干开始努力干

Category:AllAll,OralOral,WrittenWritten,TitleTitle,TechnicalTechnical

Source:AllAll,DictionaryDictionary,WebWeb

Difficulty:AllAll,EasyEasy,MiddleMiddle,HardHard

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