方向为x正轴方向，在碰撞前，它有一定动量。
Let this be the direction of increasing x, and so before the collision I have a certain amount of momentum.
在最新的科学研究里，科学家发现被测试者有以下现象：如果他们感觉到他们被人拒绝的话，在人们熟知的大脑前环带皮层的血液流动量会增加。
In a recent study, scientists observed that when the participants felt rejected, the flow of blood increased to the area of their brain known as the anterior cingulated cortex.
引入尾流收缩比因子，并将大速度时的涵道等效为圆形机翼，建立了一个适合于直升机悬停和前飞状态涵道尾桨气动特性分析的动量理论方法。
The shroud at high speed is modeled as an elliptic wing in order to construct a momentum theory method to investigate the aerodynamic characteristics of ducted tail rotor in hover and forward flight.
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