spark

2 篇文章
The first spark appeared four billion years ago.
Walden 21
•
15 0 3

The first spark appeared four billion years ago. 第一丝火花出现在40亿年前

spark appeared first four the billion ago years
Where did life first spark into being?
Walden 21
•
17 0 2

Where did life first spark into being? 生命起源于何处

spark did life being where into first
  • 1