I was doing my homework at the same time my mother was watching TV

When the city is developing,搜趣网 do the manners of citizens improve at the same time?
当城市正在发展，市民的礼仪举止也会同时改www.souquanme.com善吗？
--精；锐；五；角；场；搜趣网

he and i fininshed our homework at the same time.
他和我同时完成作业。

at
the
same
time强调在某一个时间点，某分某秒某一天某个月这种时间点，
而during
the
same
time强调某一个时间段，在某个期间。可能我解释的不是特别严格，就像at
night
，意思是在晚上，而during
night就是在夜间（晚上这一期间）。
如有不妥希望大神//www.souquanme.com们指正，谢谢。

可以
Never before has the industry had to cope with war and recession at the same time.
这个行业以前从未有过必须同时应付战争和萧条的经历。