Say what these proverbs mean. Do you know any Russian proverbs about health and food. What are they? An apple a day keeps the doctor away. Eat with pleasure, drink with measure.

K₂SO₄
(соль, сульфат калия).
AlCl3
(соль, хлорид алюминия).
MgO
(оксид, оксид магния).
NaOH
(основание, щёлочь, гидроксид натрия).