英语语法分析

It was a long time before the cleanup was finished.

过了好久才清理完毕。

He has set up the world's first ocean cleanup system with his team.

他和他的团队建立了世界上第一个海洋清理系统。

He left school in 2013 to begin work on his project The Ocean Cleanup.

2013年，他离开学校，开始他的“海洋清理”计划。