1. 把膝盖弯曲(屈膝)2. 曲你的膝盖例句:1.Now bend your knees and hug them towards your chest. 现在弯曲你的膝盖并向胸部靠拢。 2.Let me examine your abdomen. Lie down on your back and bend your knees up please. 让我检查一下您的肚子，请仰着躺下，把腿蜷起来
