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 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.
保持身体在一侧的姿势产生的拖曳阻力相对保持身体水平的姿势来说是一样的，不多也不少。
Holding the body on the side produces no more or no less drag resistance than holding it prone in crawl or backstroke.
既然你的身体就象看围绕你的中心看到的行为一样，那么它会使你的你腿在水中下沉，产生额外的拖曳阻力。
Since your body ACTS like a see saw around your centre, this causes your legs to sink in the water, creating extra drag. 3.
既然你的身体就象看围绕你的中心看到的行为一样，那么它会使你的你腿在水中下沉，产生额外的拖曳阻力。
Since your body ACTS like a see saw around your centre this causes your legs to sink in the water creating extra drag. 3.
光滑的冰面对于物体——譬如在冰面上拖曳的冰刀——施加极小的摩擦阻力。
Smooth ice provides very little resistance against objects, like ice skates, being dragged across its surface.
根据试验结果和建立的运动方程，获得阻力系数与圆管形状的关系，并计算了圆管所受到的拖曳力。
Based on the test results and movement equation established, the relationship between drag coefficient and tubular shape is obtained and the drag force imposed on pipe is calculated.
光滑的冰面对于物体——譬如在冰面上拖曳的冰刀——施加极小的摩擦阻力。
Smooth ice provides very little resistance against objects, like ice skates , being dragged across its surface.
针对该型线又进行了不同水深的阻力模型拖曳试验，并根据试验结果讨论了高速艇的浅水效应。
Model tests for this hull lines are conducted at different water depth in towing tank, and the effect of shallow water on craft performance is investigated.
为了在水池内测出船模拖曳时锚链在水流中的阻力系数，设计了一套简单而有效的实验方案。
A simple and effective experimental design is presented in this paper to determine anchor chain drag coefficient in a towing tank.
双方共同努力将有一个非常小的阻力减少，在邮轮作为机翼阻力只是一个部分的总飞机拖曳(和我的stol设计是不是很“干净”)，以及该档位的速度会更高。
Both together will have a very small drag decrease in cruise as the wing drag is only a part of the total airplane drag (and my STOL designs are not very "clean"), and the stall speed will be higher.
双方共同努力将有一个非常小的阻力减少，在邮轮作为机翼阻力只是一个部分的总飞机拖曳(和我的stol设计是不是很“干净”)，以及该档位的速度会更高。
Both together will have a very small drag decrease in cruise as the wing drag is only a part of the total airplane drag (and my STOL designs are not very "clean"), and the stall speed will be higher.
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