这句话中when怎么理解?there was once a time when,if a lady got onto a crow_英语解答

这句话中when怎么理解?
there was once a time when,if a lady got onto a crowded bus or train,a gentleman would immediately stand up and offer her his seat

人气：193 ℃　时间：2020-05-02 22:23:16

解答

同位语从句,引出对于time的解释说明.
这句话的理解就是,“曾经有这么一个时候”,什么“时候”呢?用when引出后半句,“如果一个女士上了一辆拥挤的巴士或者火车,那么一个绅士就会马上站起来并把自己的座位让给她.”