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to catch up (with); to draw level; to pull even; to reach
to be compensated; to make up for one's losses
走って先に行った友達に追い着いた。
I ran and caught up with the friend who went ahead.
技術の進歩に追い着くのは大変だ。
It's hard to keep up with technological advances.
彼のレベルに追い着くまで練習する。
I'll practice until I catch up to his level.