简而言之，在虚拟现实游戏中，投掷都是非常困难的，这是由于不能感知虚拟对象的重量。

In a nutshell, it's hard to throw in VR because you can't sense the weight of the virtual object.

youdao

就如航天飞机从地球表面升空时，其力量是以“G”计算的，因而这种速度你是不能感知的。

This is not a speed you will sense, as in G force when a shuttle takes off from the surface of the Earth.

youdao

我们不能想象生活在一个没有光和声的世界里，因此我们不能感知那些盲人、聋哑人的精神世界。

We can't imagine living in a world without light and sound, so we can't perceive the spiritual world of disabled people who are blind, deaf or even dumb.

youdao

but it's not invisible if we mean definition No. 2 can't be sensed. Can't be observed.

但如果取第二个定义它就不再无形2,无法感知，不能观察。

耶鲁公开课 - 死亡课程节选

Let's just notice that there's a difference between saying can't be seen through the eyes and can't be observed through one sense or the other.

我们只需注意到,说眼睛看不到,和不能通过感官感知到,这两者是有区别的。

耶鲁公开课 - 死亡课程节选

So even if we grant that what Socrates meant by invisible was can not be observed, we still have to say with Simmias , you know, fourth is just not true.

所以即使我们认同苏格拉底,指的无形是不能被感知，我们仍旧站在西米亚斯这边，第四点是不正确的。

耶鲁公开课 - 死亡课程节选