Leisure does not simply mean rest or inactivity but leisure is necessary for education or what he sometimes calls by the term philosophy.

安逸不单意指休憩或静止不动,安逸是教育的必备条件,或是套用,他有时会使用的词汇－哲学。

耶鲁公开课 - 政治哲学导论课程节选

One way to say it is, every body will continue to remain in a state of rest or uniform motion in a straight line.

另外一种说法是,任何物体都会继续保持静止,或匀速直线运动的状态

耶鲁公开课 - 基础物理课程节选