behind the curve
US /bɪˈhaɪnd ðə kɜrv/
UK /bɪˈhaɪnd ðə kɜrv/

1.
落后, 跟不上潮流
lagging behind current developments or trends; not up-to-date
:
•
Our company is behind the curve when it comes to adopting new technology.
我们公司在采用新技术方面落后了。
•
If you don't keep learning, you'll quickly find yourself behind the curve.
如果你不持续学习,你很快就会发现自己落后了。