shoulder throw meaning in Chinese

肩背投

With shoulders thrown back , shrill and noisy laughter and many backward glances at the men who turned to look at them , they marched about and were completely in their element
她们挺起胸部，放声大笑，回过头来向盯着她们的男人们频送秋波，像在家里那样肆无忌惮。
The soldiers ran backwards and forwards in all directions , stooping with their shoulders thrown back , drawing their knapsacks off over their heads , taking out their overcoats and lifting their arms up to thrust them into the sleeves
士兵从四面八方来回奔走，一个个向前耸起肩膀，绕过头上取下行军用的背袋，脱下军大衣，抬起一双手伸进衣袖中。