He is a world-renowned zoologist.

He claims to have seen an unidentified flying object.

This ancient proverb, 'know the other side and yourself, and you will not be in danger in a hundred battles', teaches us the importance of understanding ourselves and others.

Every morning, I chant the Heart Sutra.

I recite the Heart Sutra every day.

Chrysophyta are living in this pond.

Chrysophyta perform photosynthesis underwater, supplying oxygen.

Cell biology is the study of the structure and function of cells, which are the basic units of life.

We went to the zoo with our family on the weekend.

According to the law on specified alien species, the import of certain organisms is prohibited.