翻译：
When were the Jeans the most fashionable
参考例句：
1.The style of cloth is in fashion nowadays.
现在这种布料正流行.
2.Washed -out jeans were very fashionable at that time.那时退色牛仔裤很时髦.
来自《简明英汉词典》
3.They were in fashion last year and the year befor last year.But they're not in fashion this year.它们（指鞋子）去年以及前年是时兴的,但是今年不时兴了.
来自《用法词典》
