As temperature is reduced, at +273 K (0 C) water freezes to form ice, at +77 K ( 196 C) the nitrogen in air condenses to a liquid, and at +4 K ( 269 C) helium condenses to a liquid.
(temperature; is reduced; ) (at +273 K (0 C) water freezes; condenses; to a liquid)
temperature at +273 K (0 C) water freezes
is reduced condenses
to a liquid