The secret to his success is to work hard without taking a day off.

The store has already closed.

He is devising a secret stratagem to solve the problem.

Essential fatty acids are important nutrients for our health.

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

He is always outdone by his younger brother.

The defendant has the right to remain silent.

We need test subjects to confirm the effects of this new drug.

He felt a sense of inferiority and avoided appearing in public.

Do you understand the necessity of this project?