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.