Studies in rats show that leg muscles only produce this molecule when they are actively being flexed (for example, when the animal is standing up and ambling about).

对老鼠的研究显示，腿上的肌肉只有在它们在剧烈收缩时才会生成这种分子。(例如，当动物站着和走来走去时)。

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Bieber is currently in the middle of the Asian leg of his world tour, while Selena is touring this summer with her group the Scene, and wrapping up the final season of her Disney show.

比伯现在在东南亚中部进行他的世界巡演，而塞莱娜正和她的团队进行这个夏季的巡回演出，结束她的最后一个迪斯尼赛季秀。

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Mom took a few steps around to show them that she wasn't hiding a broken leg or a sprained ankle.

妈妈在他们面前走了几步，向大家证明，她既没有藏着一条摔伤的腿，也没有扭伤脚踝。

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Yet consumers have always been willing to show some leg in exchange for convenience.

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BSkyB will get the exclusive live rights to all games but one, in each round leading up to the semifinals, when it will show one leg of each match.

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During a fitting for the coat, she, her partner, Gail Candlin, Ms. Lamb, a Macy's spokeswoman and two female Macy's executives debated whether the coat should show more leg.

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