He always performs at his best at the critical moment.

Time flies, doesn't it?

Whenever he fails, he always sulks.

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.

She looked at his facial features and immediately understood that he was lying.

Do you understand the necessity of this project?

That information is unnecessary.

That information is completely unnecessary.

I went to the secondhand goods shop to look for old furniture.