学生们猛击树干使手部变得坚韧，蹲站在其他同学的肩膀上强化腿部力量。
They jab tree trunks to toughen their hands and practice squatting with other students sitting on their shoulders to build leg strength.
学生们猛击树干使手部变得坚韧，蹲站在其他同学的肩膀上强化腿部力量。
They jab tree trunks to toughen their hands and practice squatting with other students sitting on their shoulders to build leg strength.
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