课题 (kè tí): topic, research question

Our team's research topic this semester is urban waste sorting, and we need to submit the proposal next week.

The teacher assigned each group a project: to investigate the daily lives of elderly people in the community.

This task is too difficult; we've looked up a lot of materials but still can't find a suitable solution.

The manager made improving customer satisfaction a key task for this quarter and asked all departments to discuss plans together.

He chose a rarely studied topic for his thesis, hoping to discover new historical materials.

Solving traffic congestion is an important task currently facing the city government, and it needs to listen to citizens' opinions.