cycads
简明释义
n. 苏铁植物（cycad 的复数）
英英释义
Cycads are a group of ancient seed plants characterized by a stout and woody trunk, large compound leaves, and the production of cones. | 苏铁是一类古老的种子植物，具有粗壮的木质树干、大型复叶和产生圆锥体的特征。 |
单词用法
苏铁种类 | |
苏铁保护 | |
苏铁栖息地 | |
苏铁繁殖 | |
苏铁与蕨类植物 | |
野生苏铁 | |
作为观赏植物的苏铁 | |
世界上的苏铁 |
同义词
反义词
| 被子植物 | 被子植物是陆地植物中最具多样性的一组。 | ||
| 落叶树 | 落叶树在秋季会落叶。 |
例句
1.They expected to find evidence of well-known Late Cretaceous vegetation such as conifers and cycads.
他们原本期望发现晚白垩世时期著名植物如针叶树和苏铁存在的证据。
2.Experiments show that insects can function as pollinators of cycads, rare, palmlike tropical plants.
实验表明，昆虫能充当苏铁科植物、罕见热带植物、棕榈状热带植物的授粉者。
3.There are four widely different living groups : the cycads, ginkgo, conifers, gnetophytes, and several fossil groups.
分为四个不同的类群：苏铁类、银杏类、松柏类、买麻藤类植物以及一些化石类群。
4.The flowers of Cycads come out once a year.
苏铁类植物一年开花一次。
5.Recently, South African government has taken some actions to protect cycads from being stolen or traded.
最近，南非政府采取了一些措施来保护苏铁不被偷走或交易。
6.What causes cycads to be in danger?
是什么导致苏铁处于危险之中呢？
7.Nevertheless, anecdotal reports of wind pollination in cycads cannot be ignored.
然而，一些关于苏铁风媒传粉的传闻也不容忽视。
8.These slow-growing adult cycads even sell for tens of thousands of dollars each.
这些生长缓慢的成年苏铁每棵甚至都能卖到数万美元。
9.Many people admire cycads for their unique foliage and resilience in harsh climates.
许多人欣赏苏铁独特的叶子和在恶劣气候中的韧性。
10.The garden features several types of cycads, which are known for their prehistoric appearance.
这个花园里有几种类型的苏铁，以其史前的外观而闻名。
11.In botanical gardens, cycads are often displayed alongside ferns and palms.
在植物园中，苏铁通常与蕨类植物和棕榈树一起展示。
12.Some species of cycads can live for over a century, making them one of the longest-living plants.
某些种类的苏铁可以活超过一个世纪，使它们成为寿命最长的植物之一。
13.The seeds of cycads are often toxic, and care should be taken when handling them.
苏铁的种子通常是有毒的，处理时应小心。
作文
Cycads are fascinating plants that have existed on Earth for millions of years, dating back to the time of the dinosaurs. These ancient plants belong to a group known as gymnosperms, which means they produce seeds that are not enclosed in an ovary. The most distinctive feature of cycads (苏铁) is their large, compound leaves and stout, woody trunks. They are often mistaken for palms due to their similar appearance, but they are actually more closely related to conifers, such as pines and spruces.One of the most intriguing aspects of cycads (苏铁) is their reproductive process. Unlike flowering plants, cycads (苏铁) reproduce through cones. Male cycads (苏铁) produce pollen cones, while female cycads (苏铁) produce seed cones. The pollination process often involves specific species of beetles, which have developed a symbiotic relationship with these plants. This unique interaction highlights the complex web of life in ecosystems where cycads (苏铁) thrive.Cycads are predominantly found in tropical and subtropical regions, where they can grow in a variety of habitats, from dry, rocky slopes to lush rainforests. Their ability to adapt to different environments makes them resilient plants. However, many species of cycads (苏铁) are now endangered due to habitat destruction, overcollection, and climate change. Conservation efforts are crucial to protect these living fossils and their ecosystems.In addition to their ecological importance, cycads (苏铁) have cultural significance in various societies. In some regions, the seeds of certain cycads (苏铁) are processed to remove toxins and used as a food source. Indigenous peoples have utilized these plants for generations, showcasing their deep connection to the land and traditional practices.Moreover, cycads (苏铁) are often cultivated as ornamental plants in gardens and landscapes due to their striking appearance. Their unique foliage adds an exotic touch to any garden, making them popular among horticulturists and landscape designers. However, it is essential to source these plants responsibly to avoid contributing to their decline in the wild.In conclusion, cycads (苏铁) are remarkable plants that offer insight into the history of our planet and the intricate relationships within ecosystems. Their survival through millions of years is a testament to their adaptability and resilience. As we continue to explore the world of cycads (苏铁), we must also commit to their conservation and ensure that future generations can appreciate these extraordinary plants. Understanding and preserving cycads (苏铁) is not only vital for biodiversity but also for maintaining the cultural heritage associated with them.
