cycas

例句：

1. 1.The cycad tree is a tall and graceful plant that grows in the forest.
   杉树是一种高大而优雅的植物，生长在森林中。
2. 2. The cycad tree is known for its beautiful green leaves and white flowers.
   杉树以其美丽的绿色叶子和白色花朵而闻名。
3. 3. The cycad tree is an important source of timber and biomass energy.
   杉树是重要的木材和生物能源来源。