noun 下载 🔗分享 裸子植物 Any plant such as a conifer whose seeds are not enclosed in an ovary. Examples : "The pine tree in our backyard is a gymnosperm; its seeds are exposed in cones, not hidden inside a fruit. " 我们后院的松树是裸子植物,它的种子暴露在松果里,而不是藏在果实里面。 plant biology nature science seed 与AI对话词汇游戏阅读练习