The structure of the backbone shows, however, that Ambulocetus swam like modern whales by moving the rear portion of its body up and down, even though a fluke was missing.
不过，走鲸的脊椎结构显示，即使没有尾片，它们在水中同样能够像现代鲸鱼那样通过身体后面部分的上下摆动来游动。
游泳能强身健体。
Then straightening upper body up, setting heel plane, lifting leg point.
然后直起上身，放平脚跟，抬起腿尖。
Also elongate through the inner core of your body up through the crown of your head.
也通过身体里面的核心、通过头顶向上延长。
Frontal drag is reduced by thrusting and kicking, which brings the body up higher out of the water.
前沿阻力可以由迅捷而有力的前伸和打水来克服，比如前伸和打腿动作能把更大部分的身体前部抬高。
Lie in the prone position, with your hands on the floor and repeatedly press the upper body up and down.
弯下上身，俯卧，手撑地面，重复将上身支起并放下。
Big Air Projection: When executing the take off extension concentrate on projecting the body up into the air.
当在做起跳伸展时，要全神贯注于将身体向上投向空中。
Use Method: With both hands grip tightly on the horizontal bar, lift the body up and down. It is just for two persons once.
使用方法：双手握杠，曲肘并作上下运动，禁止横向拉动双杠。该器材较适合于中、青年人群，限二人使用。
An exercise for strengtheningarm muscles performed by lying face down with the palms on the floor, and pushing the body up and down with the arms.
俯卧撑锻炼手臂肌肉的运动，运动时脸部朝下卧着并把手掌撑在地面上并且用胳膊推动身体上下运动。
An intelligence test score in early life is partly a record of what the environment has wrought on the brain and the rest of the body up to that time.
早年的智力测试成绩一定程度上记录了截至测试时环境对大脑和身体的其他器官施加的影响。
Last year when Yao Ming broke his leg, Mutombo picked his venerable body up off the bench and helped the Rockets hold their season together with a 20-12 record.
去年姚明大腿受伤后，穆大叔拖着老迈之躯从替补席上奋起，帮助火箭稳住常规赛并交出了20胜12负的不错战绩。
Then the pair carried the body up the pitcher walls, an equally tough job because the surface is slippery, thanks to a flaky wax that helps the pitchers entrap their prey.
然后这对蚂蚁把尸体拖到植物壁上，这是一项艰巨的工程，因为表面真是太滑了，都是因为植物分泌蜡以防食物被拖走。
These clothes restrict your freedom of movement and stiffen up the whole body.
这些衣服使你的手脚难于自由活动，使整个身体也僵硬起来。
Communication within the body and the consequent integration of behavior were considered the exclusive province of the nervous system up to the beginning of the present century.
直到本世纪初，身体内的交流和随之而来的行为的整合都被认为是神经系统的专有领域。
When not in use, the fins are tucked into special grooves or depressions so that they lie flush with the body and do not break up its smooth contours.
当鱼不使用鱼鳍时，会将它们折叠起来，收回到特殊的沟槽或者凹陷部位；这样鱼鳍就可以与身体保持齐平，以维持它们平滑的外形。
Last year Glenn Tattersall of Brock University in Ontario, Canada, found the toco toucan loses up to 60 per cent of its body heat through its beak.
去年，加拿大安大略布鲁克大学的格伦·塔特索尔发现，托哥巨嘴鸟身体中高达60%的体温都会通过其喙部流失。
It was time to step it up a notch and get my body in shape it deserves.
现在是时候将其提升一个档次并使我的身体保持其应有的身材。
A leatherback may be able to pick up some body heat by basking at the surface; its dark, almost black body color may help it to absorb solar radiation.
棱皮龟可以通过在水面上晒太阳来为身体获取热量；深色近乎黑色的身体颜色可以帮助它吸收太阳辐射。
Sickness will often then be a result of unresolved inner conflicts which in time show up in the body.
疾病常常是未解决的内在冲突的结果，这些冲突最终会在体内显现出来。
The body is made up primarily of bone, muscle, and fat.
人体主要由骨、肌肉和脂肪组成。
With every stride, runners hit the ground with up to five times their body-weight.
赛跑者的每一步都以5倍于他们体重的力量撞击地面。
运动强健身体。
A cool shower wakes up the body and boosts circulation.
冷水浴使身体振奋，促进血液循环。
This treatment helps tone the body, firm up muscles and tighten the skin.
这种治疗可以帮助保持体态，使肌肉变结实、皮肤紧致。
They feel I need to bulk up, and to improve my upper body strength.
他们觉得我需要变粗壮些，并增强上身的力量。
An independent body has been set up to investigate the affair.
已成立了一个独立机构调查这件事。
Relax, smile; loosen up in mind and body.
放松，微笑；身心俱放松。
One possibility he says is that tears discharge certain chemicals from your body, chemicals that build up during stress.
他说，一种可能性是，眼泪会从身体中释放出某些化学物质，这些化学物质是在压力下积聚起来的。
Exercise warms you up, but it also causes you to lose body heat.
运动使你暖和起来，但也让你散失体热。
This is the way your body cleans up the dust in your nose.
这是你的身体清理你鼻子里的灰尘的方式。
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