进站后，他重新加入比赛，但已落后领跑者两圈。

After the pit stop, he rejoined the race two laps behind the ___leader.

该公司已在可再生能源技术领域确立了世界领先地位。

The company has established itself as a world ___leader in renewable energy technology.

在整个马拉松比赛中，她都保持着领先者的位置。

Throughout the marathon, she maintained her position as the ___leader.