Unit13 Healthy eating
Words and expressions
junk n. old useless things 垃圾
You should get rid of all the old junk in the room. 你该把室内的所有破烂清除掉。
junk food 垃圾食品
fat n. a substance like oil which is used in cooking脂肪；油脂
They have a lot of fat under their skin. 它们的皮肤下面有很多脂肪。
vitamin n. any one of several chemical substances necessary for health维生素，维他命
Oranges contain vitamin C. 橘子含有维生素C。
