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to tighten
例
She tightened the straps of her backpack before setting off on the hike.
She tightened her grip on the handlebars as she rode over the bumpy terrain.
He used a wrench to tighten the bolts on the machine.
As the storm approached, he hurried to tighten the ropes securing the tent.
He tightened the lid on the jar to keep the contents fresh.
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