Nowadays, if you go to outer space, you can check for yourself that if you throw something out, it just goes on forever without your intervention.

现如今,如果你去了外太空,你可以向外抛个物体试试,如果你不打断它,它就会一直运动下去

耶鲁公开课 - 基础物理课程节选

You send something, you'll find it goes on forever.

向外抛一个物体,它就会一直运动下去

耶鲁公开课 - 基础物理课程节选

If you remember from reading the Iliad and Odyssey, it is absolutely critical in the Greek religion that people be properly buried, because if they're not, then their shade goes on forever in misery and pain.

伊利亚特》和《奥德赛》中提到过,死者得到妥善安葬,在希腊信仰中是极其重要的,如若不然,死者的灵会永远在绝望和痛苦中飘荡

耶鲁公开课 - 古希腊历史简介课程节选