somewhere along the line
US /ˈsʌmˌwɛr əˈlɔŋ ðə laɪn/
UK /ˈsʌmˌwɛr əˈlɔŋ ðə laɪn/

1.
在某个环节, 在某个时候
at some unspecified point during a process or sequence of events
:
•
I must have made a mistake somewhere along the line.
我一定是在某个环节出了错。
•
Things went wrong somewhere along the line, and we lost the deal.
在某个环节出了问题,我们失去了这笔交易。