He emphasized the importance of class struggle.

The epiblast plays a crucial role in early mammalian embryogenesis.

He was hit hard in the solar plexus during the boxing match.

This mineral is called ulexite and has special optical properties.

He always boasts, but in reality, he does nothing.

He has a habit of always boasting.

My new electric vacuum cleaner is very quiet, making cleaning easier.

Topology is a branch of mathematics that abstracts and generalizes the concept of space.

He was moved by the view from the top of the skyscraper.

This area has undergone such a great change that it can be described as 'the sea has turned into a mulberry field'.