Infrared light is about to follow the ball up and down with rotating machine, full use of light, so that the camera has captured a clear image.

红外灯跟随球机一起上下左右旋转，充分利用光源，使摄像机一直拍摄到清晰的图像。

youdao

I'll show you how to hit the ball and then you must copy [follow] my example.

我先做给你看如何击球，然后你必须照我的示范去做。

《新英汉大辞典》

Results, which Diaz plans to submit to a scientific journal when he's done with follow-up studies, showed that half of the people were terrible at guessing where the ball went.

结果显示一半的人完全猜错了足球将飞向什么方向，另外一半则猜对了。

youdao

Unlike the traditional "drift" defense, in which defenders take a few steps towards the opposition and then follow the ball across the field, the rush attempts to limit the supply of easy yards by stopping opposing runners in their tracks.

WSJ: Wales Unleashes Its Behemoths

Ibrahmovic struck a powerful shot into the English defensive wall and then sliced his follow-up, but the ball squirted through to Mellberg, whose scuffed effort dropped over the line, despite an attempted clearance by Glen Johnson.

WSJ: Euro 2012: England Beats Sweden 3-2

Ngog came storming into the six-yard box but, faced with an open goal, contrived to shin the ball against the crossbar, with Kuyt's follow-up diverted to safety.

BBC: Sport - Football - Blackburn 0-0 Liverpool