ammonite

简明释义

英[ˈæmənaɪt]美[ˈæmənaɪt]

n. （古生）菊石（鹦鹉螺的化石）；硝基铵类炸药；干肉粉（作肥料用）

英英释义

单词用法

同义词

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例句

1.Some ammonite fossils have tooth marks that look as though they were made by huge reptilian predators called mosasaurs.

一些鹦鹉螺化石上有牙印，看上去仿佛是巨大爬虫类捕食者比如沧龙留下的。

2.LORIAN LEONHARD, a London violin dealer, keeps a large fossilised ammonite in his showroom.

伦敦小提琴商人洛里安•里昂哈德在陈列室放了一大块菊石化石。

3.The territory of Jazer, all the towns of Gilead and half the Ammonite country as far as Aroer, near Rabbah;

他们的境界是雅谢和基列的各城，并亚扪人的一半地，直到拉巴前的亚罗珥。

4.When Sanballat the Horonite, and Tobiah the servant, the Ammonite, heard of it, it grieved them exceedingly that there was come a man to seek the welfare of the children of Israel.

和伦人参巴拉、并为奴的亚扪人多比雅、听见有人来为以色列人求好处、就甚恼怒。

5.Some ammonite fossils have tooth marks that look as though they were made by huge reptilian predators called mosasaurs.

有些鹦鹉螺化石上的齿痕看起来好像是由巨大的爬虫类捕食者沧龙留下的。

6.An example is the KT Mass Extinction when the last dinosaur and ammonite species, among others, became extinct, perhaps as a result of an asteroid striking the Earth.

比如，白垩纪至第三纪所发生的大灭绝。当时，可能由于一颗小行星撞击地球，恐龙和众多同时代的物种都灭绝了。

7.Romero's red "Ammonite," Hadid's "Flames" and Van Berkel's "UNX2" redefine the heel.

罗梅罗设计的红色的“菊石”，哈迪德设计的“火焰”和范•伯克尔设计的“UNX2”重新定义了脚后跟。

8.The museum has a fascinating exhibit on ammonites 菊石 that lived millions of years ago.

博物馆有一个关于生活在数百万年前的菊石 ammonites的迷人展览。

9.Many fossil collectors seek out ammonites 菊石 for their unique spiral shapes.

许多化石收藏家寻找菊石 ammonites，因为它们独特的螺旋形状。

10.In geology class, we learned how to identify ammonites 菊石 based on their distinctive patterns.

在地质课上，我们学习了如何根据菊石 ammonites的独特图案来识别它们。

11.The fossilized ammonite 菊石 was found in a sedimentary rock layer.

化石化的菊石 ammonite是在一层沉积岩中发现的。

12.Some jewelry designers incorporate ammonite 菊石 into their pieces for a natural look.

一些珠宝设计师将菊石 ammonite融入他们的作品中，以获得自然的外观。

作文

The study of fossils has always fascinated me, especially the intricate and beautiful shells of ancient marine creatures. Among these fascinating fossils, the ammonite stands out as one of the most remarkable. An ammonite (菊石) is a type of extinct mollusk that lived during the Mesozoic era, approximately 240 to 65 million years ago. These creatures are known for their spiral-shaped shells, which can be found in various sizes and are often beautifully preserved in sedimentary rock. The presence of ammonites in geological formations serves as an important indicator of the age of the rock, making them invaluable to paleontologists and geologists alike. The structure of an ammonite shell is not only aesthetically pleasing but also scientifically significant. The shell is divided into chambers, which were filled with gas to help the creature maintain buoyancy in the water. This unique adaptation allowed ammonites to thrive in diverse marine environments, from shallow coastal waters to the deep ocean. The intricate patterns and designs on their shells are the result of complex growth processes and environmental factors, making each fossil a unique piece of natural art. One of the most intriguing aspects of ammonites is their evolutionary history. They belong to the subclass Ammonoidea and are closely related to modern squids and octopuses. The evolution of ammonites showcases the incredible diversity of life that existed millions of years ago. Their existence spanned over 300 million years, during which they adapted to various ecological niches. This adaptability is a testament to the resilience of life and its ability to evolve in response to changing environmental conditions. Unfortunately, ammonites went extinct during the mass extinction event at the end of the Cretaceous period, which also led to the demise of the dinosaurs. The reasons for their extinction are still debated among scientists, but it is believed that drastic changes in climate and sea levels, along with the impact of a large asteroid, played significant roles. Despite their extinction, ammonites continue to captivate our imagination and provide valuable insight into the history of life on Earth. In recent years, the popularity of ammonites has surged, particularly among collectors and enthusiasts. Fossilized ammonite specimens can be found in many natural history museums, showcasing their beauty and complexity. Many people appreciate these fossils not only for their scientific significance but also for their aesthetic appeal. Jewelry made from polished ammonite fossils has become a popular trend, allowing individuals to wear a piece of ancient history. In conclusion, the ammonite (菊石) is more than just a fossil; it is a window into the past that reveals the story of life on Earth millions of years ago. Through the study of ammonites, we gain a deeper understanding of evolution, extinction, and the intricate web of life that has existed throughout Earth's history. Whether you are a scientist, a collector, or simply someone who appreciates the wonders of nature, ammonites offer a glimpse into a world long gone, reminding us of the beauty and fragility of life.