palaeophyte

例句：

1. 1. Palaeophytes are the oldest living organisms on Earth.
   古植物是地球上最古老的活生物。
2. 2. Palaeophytes have been found in ancient rocks dating back thousands of years.
   古植物在古老的岩石中被发现，这些岩石可以追溯到数千年前。
3. 3. Palaeophytes play a crucial role in the carbon cycle as they absorb carbon dioxide from the atmosphere.
   古植物在碳循环中起着至关重要的作用，因为它们从大气中吸收二氧化碳。