Researchers then recorded their positions and hours of activity over eight years.

研究人员随后记录了他们在八年内的位置和活动时间。

The scientists used high-speed video cameras to record the position of the snakes as they moved sideways up different inclines.

科学家使用高速摄像机记录蛇在不同斜面上升时的位置，这种运动叫蛇形。

The microchip over here records the exact angular position every  thousandth of a second and compares it with the previous position.

这里的微芯片每千分之一秒记录一次精确的角度位置，并将其与之前的位置进行比较。