Laboratuvar önlüğündeki leke gümüş nitrat yüzünden.
- The stain on the lab coat is due to silver nitrate.
Doğal maden suyu kalsiyum, magnezyum, sodyum, potasyum ve ayrıca nitrat içerir.
- Natural mineral water contains calcium, magnesium, sodium, potassium as well as nitrate.