We spread phosphate fertiliser on the field.

He is collecting centime, the old currency of France.

I want to go to Saint Barthélemy.

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.

Please calculate the area of this right triangle.

This ring is made of alexandrite.

Hydrocyanic acid is a very dangerous chemical.

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

In this chemical reaction, cyclohexane is the main product.