科技英语阅读第二单元discoures understanding.docVIP

A、 Now, let’s talk about the kind of muscle you think of when we say “muscle”—the ones that show how strong you are and let you boot a soccer ball into the goal. 现在，让我们来谈谈那种当我们说起肌肉时你会想到的肌肉 — — 那些能显示你有多强壮，并让你将足球踢进球门的肌肉。 B、 Skeletal muscles come in many different sizes and shapes to allow them to do many types of jobs. 骨骼肌有许多不同大小和形状来让他们做很多类型的工作。 C、 Together, the skeletal muscles work with your bones to give your body power and strength. 骨骼肌与你的骨头一起给你的身体力量和强度。 D、 Smooth muscles are also found in your bladder. 你的膀胱也有平滑肌。 E、 Tendons are cords made of tough tissue, and they work as special connector pieces between bone and muscle. 肌腱是由坚韧的组织连接而成，它们作为骨和肌肉之间的特殊连接器件。 F、 Smooth muscles—sometimes also called involuntary muscles—are usually in sheets, or layers, with one of muscle behind the other. 平滑肌 — — 有时也被称为非自愿的肌肉 — — 通常在表或肌肉背后另一层的图层。 G、 The muscle that makes up the heart is called cardiac muscle. 构成心脏的肌肉被称为心脏肌肉。 Did you know you have more than 600 muscles in your body? They do everything from pumping blood throughout your body to helping you lift your heavy backpack. You control some of your muscles, while others—like your heart—do their jobs without you thinking about then at all. Muscles are all made of the same material, a type of elastic tissue (sort of like the material in a rubber band). Thousands or even tens of thousands, of small fibers make up each muscle. You have three different types of muscles in your body: smooth muscle, cardiac muscle, and skeletal muscle. Smooth muscles—sometimes also called involuntary muscles—are usually in sheets, or layers, with one of muscle behind the other. You can’t control this type of muscle. Your brain and body tell these muscles what to do without you even thinking about it. You can’t use your smooth muscles to make a muscle in your arm or jump into the air. But smooth muscles are at work all over your body. In your stomach and digestive system, they contract (tighten up) and relax to allow food to make its journey through the