to accompany; to be associated with; to occur together with (often used as 〜に伴う / 〜に伴って).
経済の変化に伴って生活様式も変わってきた。
Lifestyle has also changed along with economic changes.
都市化に伴う環境問題が深刻になっている。
Environmental problems associated with urbanization are becoming serious.
季節の移り変わりに伴い、服装を調整してください。
Please adjust your clothing according to the changing seasons.
to bring with; to be accompanied by; to entail (something) (often used as 〜を伴う).
大きな手術には一定のリスクを伴う。
Major surgery involves certain risks.
成長には努力と犠牲を伴うことが多い。
Growth often entails effort and sacrifice.
新制度の導入は混乱を伴ったが、徐々に安定してきた。
The introduction of the new system involved some disruption, but it gradually stabilized.