她用一根长杠杆撬起了那块沉重的石头。
She used a long ___lever to lift the heavy rock.
他用撬棍把石头从路上撬开。
He ___levered the stone off the road with a crowbar.
政府将税收政策作为经济调控的重要杠杆。
The government uses tax policies as key ___levers for economic adjustment.
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