横向
1
Chemical element in table salt
4
Our home planet
5
Ball of burning gas in space
8
Biological catalyst
纵向
2
Smallest unit of an element
3
Hottest planet in solar system
6
Substance with pH above 7
7
Path of a planet around the sun
Chemical element in table salt
Our home planet
Ball of burning gas in space
Biological catalyst
Smallest unit of an element
Hottest planet in solar system
Substance with pH above 7
Path of a planet around the sun