The thrust force is mainly due to the drag of the wings in the upstroke.
平衡身体阻力的推力主要由翅膀上拍中产生的阻力提供。
The peak polished rod load occurs near the bottom of the stroke with the start of the upstroke.
最大光杆负荷发生在上行冲程开始时的冲程底部附近。
Modern birds use a similar bone in flight, drawing their wings toward their bodies during an upstroke.
现代鸟类在飞行时也需要依赖这块腕骨，它们通过这块骨骼牵引翅膀以获得抬升力。
The difference in the peak load on the upstroke and the minimum load on the downstroke of a polished rod.
光杆上行冲程时的最大负载与下行冲程时的最小负载之差。
With the down stroke of a wing during flight, the body moves up, but the subsequent upstroke can counter that force.
用飞行翼的上下行程，身体向上移动，但随后的冲程可以对抗这种力量。
In just six seconds he was moving seventy miles per hour, the speed at which one's wing goes unstable on the upstroke.
在六秒钟内，他以每小时七十英里的速度运动。在这样的速度下，翅膀向上一举，就会失去平衡。
The lines that formed the letters started again each time on the upstroke, the downstroke, and before the curves and loops.
那些组成字母的一行行字每次开始写时都朝上挑，朝下冲的，而且还是在那些曲线和圈圈之前。
Neither sodium valproate nor Verapamil showed any effect on action potential amplitude, overshoot, resting potential and phase o upstroke velocity.
丙戊酸钠和异搏定对动作电位幅度、超射值、静息电位、O期最大除极速度均无明显影响。
The flow fields are different for the three phase motion patterns and there are two types of leading-edge vortex motion at an earlier stage of upstroke or downstroke.
三种相位下的涡流场形态各有不同，上挥（下拍）初期前缘涡的运动主要存在两种形态。
According to the belt tension analysis of the large near-horizontal and upstroke conveyor during braking and starting, this paper gives the effects of brake location on the take-up tension.
通过近水平和上运大型带式输送机制动工况和起动工况的张力分析，明确了制动装置位置对输送带张紧力的影响，进而提出大型输送机制动与张紧装置的优化布置方法。
For example, birds clap their wings together at the peak of the upstroke during takeoff - that's the clatter of a pigeon taking off in the park - and rotate their wings on the way down to get lift.
例如，鸟儿在起飞上升的顶点合起它们的翅膀——这是公园里鸽子起飞时扑哧的声音——在降落时旋转它们的翅膀以获得升力。
For example, birds clap their wings together at the peak of the upstroke during takeoff - that's the clatter of a pigeon taking off in the park - and rotate their wings on the way down to get lift.
例如，鸟儿在起飞上升的顶点合起它们的翅膀——这是公园里鸽子起飞时扑哧的声音——在降落时旋转它们的翅膀以获得升力。
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