In this experiment, you can observe a chemical reaction.

My child attends a supplementary school every Saturday.

This blade is very sharp.

Essential amino acids cannot be produced by the human body, so they 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.

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

He is suffering from combat stress reaction.

He understands the meaning of the proverb 'Teaching is half learning', which means that teaching leads to one's own learning.

Minoru is my best friend.

Stoichiometry is a method for calculating the amount of substances in a chemical reaction.