It seems like something important is lacking in his life.

Important information was omitted from his explanation.

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.