Essential amino acids, which the human body cannot produce on its own, need to be obtained from the diet.

Essential amino acids are necessary to be taken from our diet because our body cannot produce them on its own.

He finally passed the exam, proving that the third time's a charm.

Please calculate the area of this right triangle.

This ring is made of alexandrite.

I am a member of the Third International.

Hydrocyanic acid is a very dangerous chemical.

As soon as he arrived, he said 'I just got here.'

He drew an equilateral triangle shape.

In this chemical reaction, cyclohexane is the main product.