膝跳反射



jerk
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vt.1. 把...猛地一拉(或一推,一扭,一扔等)He jerked the window open.他猛地一推把窗子打开。He jerked the string and the puppet jumped.他猛一拉线,木偶就跳动了。2. 急促地说vi.1. 猛然一动;猛推(或急拉等)I felt the fishing line jerk.我感觉到钓丝猛然一动。2. 颠簸,摇晃The truck jerked to a stop.卡车晃动了几下便停下来了。3. 抽搐,痉挛n.[C]1. 猛然地一拉(或一推,一扭,一扔等)2. 颠簸,摇晃The bus stopped with a jerk.汽车晃了一下,停住了。3. (肌肉的)抽搐,痉挛4. 【美】【俚】蠢人;古怪的人That jerk was flirting with the boss" daughter.那个笨蛋和老板的女儿调情。