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to knuckle down
[phrase form: knuckle]
01
to begin to work or study hard and focus seriously on a task or goal
例
The athletes knuckled down to their training ahead of the Olympic Games.
The company is knuckling down to prepare for the upcoming launch.
I need to knuckle down and study for these exams.
You're going to have to knuckle down to your studies if you want to pass your exams.
