A flowering seed plant (Spermatophyta), distinguished by producing seeds that are enclosed fully by fruits. Angiosperms are the most highly evolved of plants, and appear first in rocks of Lower Cretaceous age.
科学参考收录了60776条科技类词条，基本涵盖了常见科技类参考文献及英语词汇的翻译，是科学学习和研究的有利工具。