common element theory

例句：

1. 1. The commonelement theory suggests that all living things are descended from a single ancestor.
   共同要素理论认为所有生物都起源于一个共同的祖先。
2. 2. This theory has been widely accepted by scientists and is used to explain phenomena in nature.
   这一理论被科学家广泛接受，并用于解释自然界的现象。
3. 3. The common element theory emphasizes the importance of shared characteristics among different species.
   共同要素理论强调不同物种之间的共同特征的重要性。