I now would like to write down, in most general form the equation for the position and the velocity as a function of time for a one-dimensional motion whereby the acceleration is constant.

我来把更一般的形式，写出来吧，在一维空间中，位置和速度，作为时间函数的，一般形式，这里的加速度是一个常数。

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This paper proposes, for the first time, a simplified mechanical model in an attempt to treat the motion of a cell sliding into a two-dimensional slit.

本文首次提出一个简化的力学模型，试图探讨细胞挤入二维狭缝的运动特性。

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Two dimensional image was obtained by transesophageal echocardiography. The thickness, wave time and velocity were showed during atrial septal motion by omni directional M mode echocardiography (OME).

应用经食管超声心动图获得二维图像，全方向M型超声显示并测量房间隔运动时的厚度、波幅时间及速度。

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