one's leisure _____ one's leisure time 有什么区别?____ one's spare time

问题描述:

one's leisure _____ one's leisure time 有什么区别?____ one's spare time
one's leisure _____ one's leisure time 有什么区别?
____ one's spare time _____ one's free time
我看到有的是全at,有的是in one's spare time,那么 at one's free time 不能用In吗

in one's leisure time [hours,moments]
在空闲时间里
at one's leisure
有空时
二者没有明显的区别;time前面用in的话是及时的意思,而在……时候习惯用语为at,而不能用in.