behind the times
US /bɪˈhaɪnd ðə taɪmz/
UK /bɪˈhaɪnd ðə taɪmz/

成语
1.
落伍, 过时
old-fashioned; not modern or current
示例:
•
My grandfather is a bit behind the times when it comes to technology.
我爷爷在科技方面有点落伍。
•
Their business practices are so behind the times that they're losing customers.
他们的商业惯例太落伍了,以至于他们正在失去客户。
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