buckle down phrasal verbphr v WORK HARDto start working very hard 开始认真做；埋头干 to You’d better buckle down to some revision now. 你现在最好坐下来好好复习。
buckle to• They have not buckled down to the determination to fight this war through.• If individuals are forced to face the reality of starvation, everyone will buckle down to work.
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