伸展双臂时，其质量分布空间更大。
With arms outstretched, her mass is distributed over a greater space.
我笑着伸展双臂，仰面朝天躺在雪地里。
With a laugh, I spread my arms out and fell backwards into the snow.
他伸展双臂，远眺暗黑地平线，与沙漠里砂岩风雕塑和无数沉默的鲸鱼对视。
He spread his arms, taking in the dark horizon and the desert with its sandstone wind sculptures and its countless silent whales.
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