Muscular contractions do not always cause actual movement. A small fraction of the total number of fibers in most muscles are usually contracting. This serves to maintain the posture of a limb and enables the limb to resist passive elongation or stretch. This slight continuous contraction is called muscle tone.
- contraction [kənˈtrækʃən] n.收缩
- fraction [ˈfrækʃən] n.小部分
- fiber [ˈfaibə] n.纤维
- posture [ˈpɔstʃə] n.姿势
- resist [riˈzist] v.抵抗; 对抗
- passive elongation [ˈpʌsiv - i:lɔŋˈɡeiʃən] n. 被动延伸
- stretch [stretʃ] n.伸展
- continuous [kənˈtinjuəs] adj.连续的
- muscle tone [ˈmʌsl - təun] n. 肌肉弹性，肌肉张力
