She used to be a prostitute, but now she has started a new life.

He was hiding the fact that he was an illegitimate child.

The National Research and Development Agency plays a crucial role in advancing science and technology.

He solved the problem in a scientific way.

This reaction occurs through a chemical process.

He exercises every day and leads a healthy life.

Fundamental knowledge of mathematics is necessary to solve advanced problems.

He is good at tactical thinking.

This park was completely artificially made.

She is looking for an ideal partner.