0 one of many tissues in the body that can tighten and relax to produce movement -- 肌肉
facial muscles 脸部肌肉
He flexed his muscles (= tightened them to make them look large and strong) so that everyone could admire them. 他将肌肉紧绷起来，这样大家就能欣赏到他的肌肉块。
These exercises build muscle and increase stamina. 这些运动能强健肌肉、增加体力。
a muscle spasm (= a sudden uncontrollable tightening movement) 肌肉痉挛
Russell pulled a back muscle early in the game. 比赛开始没多久拉塞尔就拉伤了背部肌肉。
1 the power to do difficult things or to make people behave in a certain way -- 力量，实力
The contraction of this muscle raises the lower arm.
A work-out in the gym will exercise all the major muscle groups.
Barkley suffered a strained thigh muscle late in the preseason.
Previous studies have indicated that more than 1 type of muscle fibre is present in flatworms.
The section on anatomy is par ticularly useful for understanding how the nerves and muscles work.
If for example, the growth of a bone is delayed, so too will be that of the associated muscles and tendons.
