Keeping head down and in line reduces drag.
头降低在身体直线上会减少阻力。
Lifting your head is bad swimming technique, it causes your legs to sink - adding lots of drag.
抬头是很糟糕的游泳技巧，它使腿部下沉，增加不少阻力。
The aerodynamic shape design of train head should consider all kinds of factors because the relation between reducing aerodynamic drag and air pressure pulse may be conflictive and uniform.
减小列车空气阻力和降低列车交会压力波，既矛盾又统一，列车气动头部外形设计需要综合考虑各种因素。
Drag of the train head is obtained by the method of surface integral and drag coefficient can be computed at the same time.
通过表面积分的方法得到各种列车车头的阻力，进而计算得到了车头模型的阻力系数。
The clear orchid continues to lower the head, heart course, you drag down, menace who?
明兰继续低着头，心道，您拉倒吧，唬谁呢？
The results indicate that the head-on wind area of the TAB is the main factor in determining the drag size.
结果表明，挡流板的迎风面积是决定阻力大小的主要因素。
A series of train heads is obtained by changing the rate of length and width of a certain train head, in order to know if the rate will affect the drag coefficient.
对于同一种车型改变了它的细长度得到一系列车头模型，分析计算了细长度对车头阻力系数的影响。
The problem with lifting your head to breathe is that your body ACTS like a see-saw and your legs sink. This adds lots of extra drag.
抬头呼吸的问题是正如所见一样的身体行为和你的腿在下沉。这会增加额外的拖曳阻力。
The head wheel is provided with teeth fitting with the drag chains.
头轮上设有与牵引链相吻合的齿。
The fatty shakes head to say not right:"The person walked, the ship is affirmative to also drag along to walk, cast away here calculate what matter?"
胖子摇头说不对：“人走了，船肯定也得拖走，丢在这里算什么事？
Last drag home for the elderly only a 18 feet-long fish skeleton, the only complete skeleton is the head and beautiful fish tail.
老人最后拖回家的只是一副十八英尺长的鱼的骨架，骨架上唯一完整的是鱼头和漂亮的鱼尾巴。
Last drag home for the elderly only a 18 feet-long fish skeleton, the only complete skeleton is the head and beautiful fish tail.
老人最后拖回家的只是一副十八英尺长的鱼的骨架，骨架上唯一完整的是鱼头和漂亮的鱼尾巴。
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