He went out in the middle of the night to covertly investigate the incident.

Calculating the value of the tangent, which is one of the trigonometric functions, is difficult.

How many liters of water can this tank hold?

He buttoned up his shirt.

His painting has beautiful red and green hues.

The sacred Japanese crane, known as Tancho, captivates people with its beautiful appearance.

He is taking great care of that garden.

He exerted himself on the project with all his might.

This gem is made of cinnabar.

The red color in this painting is made with cinnabar.