54、level2-unit2-part5 vocabular

the Sun
the Sun gives us energy.太阳给我们能量。  90

the Moon
the light from the Moon comes from the Sun.月亮的光来自太阳

Earth
this is our planet, it goes around the Sun once a year.这是我们的星球，它每年绕太阳一周。

stars
we see stars as small points of light in the night sky.我们把星星看作夜空中的小光点。91

galaxy    /'ɡæləksi/ 
a galaxy has billions of stars.一个星系有数十亿颗恒星。
except for our own galaxy, they are very far away.除了我们自己的星系，它们非常遥远。88   /ɪkˈsept/ 

1）the Sun/ the Moon/ the earth/ the United States
前面都加了定冠词the,表示独一无二的事物
2）see sth. as sth.把...看做...
3）except for :除...之外，不包括...（后面只能跟名词或名词短语）