loosen up

柯林斯词典

1. PHRASAL VERB If a person or situation loosens up, they become more relaxed and less tense. 放松; 缓解
Relax, smile; loosen up in mind and body. 放松，微笑；身心俱放松。
Things loosened up, in politics and the economy. 政治和经济方面的情况都有所缓解。
2. PHRASAL VERB If you loosen up your body, or if it loosens up, you do simple exercises to get your muscles ready for a difficult physical activity, such as running or playing sports. 放松 (肌肉)
Squeeze the foot with both hands to loosen up tight muscles. 用双手捏脚以放松僵硬的肌肉。