Muscle is the tough, elastic tissue that makes body parts move. All animals except the simplest kinds have some type of muscle.People use muscle to make various movements, such as walking, jumping or throwing. Muscles also help in performing activities necessary for growth and for maintaining a strong, healthy body. For example, people use muscles in the jaw to chew food. Other muscles helps move food through the stomach and intestines, and aid in digestion. Muscles in the heart and blood vessels force the blood to circulate. Muscles in the chest make breathing possible.Type of musclesThe human body has more than 600 major muscles. About 240 of them have specific names. In general, muscles are classified into three groups: (1) skeletal muscles, (2) smooth muscles and (3) cardiac muscles.Tough 坚韧的Elastic 有弹性的Movement 运动，移动Jaw 下巴Chew 咀嚼Digestion 消化Circulate 循环Skeletal muscle 骨骼肌Smooth muscle 平滑肌Cardiac muscle 心肌
LXLSXS
老师，我觉得您讲解完再把音频再放一遍，复习一下会更好。可以吗？谢谢！
听友391111327
姐姐好棒！希望字幕也能跟上！
听友385171497
有些英语单词在有道词典上都搜索不了嘞？，比如verias.还有drawl翻译出来是慢吞吞地说
听友391111327 回复 @听友385171497：
various 各种各样的 和 draw下巴