话题 on the team

话题 on the beach

话题 on the Thames

话题 on the playground

话题 on the list

话题 on the campus

话题 on the photo

话题 on the Internet

话题 on the chance

话题 on the books

话题 on the tree

话题 on the table

问题 be hard on the eyes中的定冠词可以省略吗

下面的句子为什么要用 the eyes？The grey light was hard on the eyes. 光线暗淡对眼睛不利。可以不用定冠词吗？The grey light was hard on eyes.

问题 如何区分on,in 等是介词还是副词

如何区分 on, in 等是介词还是副词？谢谢！

问题 介词短语复合结构

词典上看到个句子：Despite his six years in politics, he was still regarded by many as the new kid on the block.请问Despite his six years in politics如何理解？这个结构是怎么回事，完全看不懂。