This castle is specially illuminated every winter.

Let's turn off the lights when it becomes 10 o'clock at night.

Maoism is an important element in forming Chinese communism.

He was imprisoned as a political prisoner for political reasons.

Freedom of thought is one of the basic human rights.

He is deepening his research on Sinocentrism.

A new approach is needed to solve this set of problems.

The main problem with this project is the lack of communication.

This question text is too difficult, it's hard to understand.

This exam is a matter of life or death for me.