Keep objects a minimum distance from the user as objects too close to the viewer can cause confusion and simulator sickness.

让对象离玩家有一个最小距离，因为离视口太近会引起疑惑和眩晕症。

youdao

He began as a juggler, someone who can keep several objects in the air at the same time.

VOA: special.2009.03.09

And it's actually critically important to get used to things because it's a useful adaptive mechanism to keep track on new events and objects.

而习惯化实际上也是至关重要的,因为这是一种非常有用的适应机制,可以让你注意到新鲜事物。

耶鲁公开课 - 心理学导论课程节选

J. lets cameras identify moving objects and keep them in razor-sharp focus.

FORBES: Spotting Evil

Alan Stern expects that after the Pluto flyby in 2015 or so, there will be plenty of power left, both electricity from the plutonium generator and fuel, so New Horizons will keep on going to explore other Plutolike objects in this region of the solar system which is known as the Kuiper Belt.

NPR: NASA Sends Spacecraft to Pluto

On days when the dogs are not involved in investigations, their handlers hide the scents or objects they are trained to seek to keep them sharp and to maintain the work-reward practice.

CNN: Canines patrol grounds daily