Bile acids play an important role in breaking down fats in the body.

This lemon is sour.

He was a swordsman named Zan in the past.

He scattered the seeds.

She gave birth to a baby in the maternity hospital.

We cannot live without oxygen.

He is good at solving trigonometry problems.

This silkworm produces beautiful silk.

He calculated the area of the triangle.

My younger brother is good at addition in arithmetic.