A common question with answers that vary by time and season , the quick answer just after sunset in middle of last month , from the norther hemisphere , was mars .
这个普普通通的问题,答案因时间和季节而异,简言之,对于北半球,上个月月中刚日落的时候,是火星。
But the primary cause of the big spike in fuel prices is last year 's bad weather : russia 's drought ; rains in pakistan , norther europe and the u.s. ; rains and floods in australia ; and dry conditions in latin america .