A menstrual cup is one of the environmentally friendly and economical menstrual products.

His blood is always flowing hot.

This room is always kept clean.

He chose a stable job, saying 'a bird in the hand is worth two in the bush.'

Essential fatty acids are vital nutrients for our health.

Essential amino acids cannot be produced by the human body, so they need to be obtained from the diet.

He is researching artificial humans.

He took out the entrails of the fish.

I presented her with flowers.

His heart is very healthy.