横向
1
Center of an atom or cell
3
Force that attracts objects together
5
Path of a planet around the sun
8
Particle of light
纵向
2
Element found in all living things
4
Curved glass that refracts light
6
Unit of energy
7
Unit of power
Center of an atom or cell
Force that attracts objects together
Path of a planet around the sun
Particle of light
Element found in all living things
Curved glass that refracts light
Unit of energy
Unit of power