The process of embryogenesis is very complex, with continuous cell division and differentiation.

Cell division is one of the basic processes of life.

Germ cells play an important role in the reproduction of organisms.

This problem is very complex and cannot be solved easily.

This festival is held every year.

In this industry, specialization is progressing.

He decided to specialise in computer science.

The process of this project was very complicated.

He went to the gym for five days in a row.

His failures happened consecutively.