Science Challenge

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2
6
4
1
3
7
5

横向

1

Biological catalyst

3

Precious yellow metallic element

5

Amplified beam of light

6

Unit of electric potential

7

Compound containing oxygen

纵向

1

Blocking of light by a celestial body

2

Absolute temperature scale unit

4

Smallest unit of an element

7

Path of a planet around the sun