He is an expert in ethology.

She brought up her child alone.

His heart seems to have frozen.

The committee approved the new project.

Please teach me how to calculate the area of this circular sector.

You should not be deceived by the deceptive advertising of this product.

The artificial satellite is orbiting around the earth.

The study of artificial life is a new frontier in science.

Higher fatty acids play an important role in our health.

This food is rich in higher fatty acids.