Butyric acid is one of the components that characterizes the flavor of butter.

He failed the exam.

He always has an optimistic attitude.

He said that listening to music is his greatest pleasure.

I get a stomachache when I eat foods containing lactose.

Galactose is a type of sugar.

He chose euthanasia for his sick dog.

His recovery was truly a miracle.

The result was truly miraculous.

He is leading a life that is at ease and free from pain.