This electrical appliance requires a direct current power supply.

This river and that river confluence here.

The false rumor hurt his reputation.

A fermion is one of the fundamental constituents of matter.

Due to the influence of ocean currents, the distribution of marine life can change.

The troposphere is a part of the Earth's atmosphere, extending from the surface to about 10 kilometers.

He set the bird free.

The colossal squid is the largest squid living in the deep sea.

Saturated fatty acids may increase the risk of heart disease.

This museum exhibits a collection of rare ulexite.