This recipe requires twice the usual amount of ingredients.

He is immersed in the study of callus.

The scenery of overlapping mountains was beautiful.

The stratum granulosum of the skin is formed by the accumulation of keratinocytes.

The leaf layer of this forest is very thick.

This stratum shows a specific facies.

The living standard of the middle class is positioned between the poor and the wealthy.

Wealthy people often dine at high-end restaurants.

We must cooperate to make this project successful.

He raised his voice to emphasize that point.