有些人想打电话回去的，但线路总是忙音(这让人认为是故意把线给卡了)，形势瞬息万变的时刻，通信偏偏拖慢了后腿。

Those who did try to return calls found the lines busy (just in case people think I mean deliberately jammed), leading to critical communication lags amid a constantly shifting situation.

youdao

有些人想打电话回去的，但线路总是忙音(这让人认为是故意把线给卡了)，形势瞬息万变的时刻，通信偏偏拖慢了后腿。

Those who did try to return calls found the lines busy (just in case people think I mean deliberately jammed), leading to critical communication lags amid a constantly shifting situation.

youdao