你知道冰冷的定义是怎么来的吗?1 K% x' y# f+ Y
$ _& U P5 h$ b3 a8 V% o
International symbol for the freezer's too cold4 e L1 f! U( k* |! K9 O, @
& K5 _7 v M9 a9 r, W# Y# e6 _/ c) x) Z
: T$ M- m g+ f1 x
. x6 w# |: {% |% Z4 n
+ T: ^4 [3 Y2 ?* D) D# u+ N* j( P
/ v3 U, g8 t& r6 ]! ]5 @( \# y, @: `( [4 t: J8 ?( \
c b& I2 {6 B7 u+ K1 K, {5 J' H/ ` |