tadpoles

简明释义

英[ˈtæd.pəʊlz]美[ˈtæd.poʊlz]

n. [脊椎]蝌蚪（tadpole 的复数形式）

英英释义

单词用法

同义词

反义词

例句

1.Like those tadpoles, we grew legs and hopped off into the world.

就像那些蝌蚪一样，我们长出了腿，并跳进了这个世界。

2.Despite their unsavoury dining habits they are devoted parents and will guard spawn and tadpoles from predators.

尽管它们的饮食习惯令人讨厌，但是它们是有献身精神的父母，会守卫自己的卵和蝌蚪，使其免遭捕食。

3.What will these small tadpoles into?

这些小蝌蚪长大会变成什么？

4.And instead of hatching as tadpoles, the offspring emerge as miniature versions of their parents-some not much larger than pinheads.

而且它孵出来的也不是蝌蚪，它的后代在刚孵出来时就拥有了跟父母一样的外表，只是尺寸小了点，有些跟针头差不多大。

5.But the startled bird theory fails to answer a simple question: why haven't the "flying" tadpoles been noticed before?

但受惊鸟理论却没有回答一个简单的问题：为什么以前没有发现“飞行”的蝌蚪呢？

6.Composed of denser cooler gas and dust the tadpoles are around 10 light-years long, potentially sites of ongoing star formation.

蝌蚪是由密集的寒冷的气体和星尘所组成的，大约10光年长，可能存在正在形成的恒星。

7.I asked them what they had to sell, and they said they had fresh tadpoles.

我问他们要去卖什么，他们说他们有新鲜的蝌蚪。

8.Even the frogs, tadpoles can destroy the larvae of many of the pests!

就连青蛙的幼虫虫- - - - - -蝌蚪也能消灭许多害虫哩！

9.The teacher explained the life cycle of frogs, starting with tadpoles.

老师解释了青蛙的生命周期，从蝌蚪开始。

10.My kids love to catch tadpoles during our summer outings.

我的孩子们喜欢在夏季外出时抓蝌蚪。

11.The pond was full of tadpoles, swimming around happily.

池塘里满是蝌蚪，快乐地游来游去。

12.As spring arrives, you can often see tadpoles in the shallow waters.

随着春天的到来，你经常可以在浅水中看到蝌蚪。

13.We observed the tadpoles as they transformed into frogs.

我们观察了这些蝌蚪如何变成青蛙。

作文

In the world of biology, few creatures are as fascinating as the tadpoles. These aquatic larvae of frogs and toads undergo remarkable transformations that capture the imagination of both children and adults alike. The journey of a tadpole begins when a female frog lays her eggs in a pond or a stream. Each egg eventually hatches into a small, wriggling tadpole, which is typically black or dark brown in color. At this stage, they have a long, flat tail and no limbs, relying on their tails for swimming through the water. This initial form is essential for their survival, as they must navigate their environment to find food and avoid predators.As tadpoles grow, they primarily feed on algae and plant matter, which provides them with the necessary nutrients to develop. During this phase, they also exhibit interesting behaviors, such as swimming in groups and exploring their surroundings. It is during this time that they begin to undergo significant physiological changes. Over the course of weeks or months, depending on the species and environmental conditions, tadpoles start to grow legs. The hind legs usually appear first, followed by the front legs, marking the beginning of their metamorphosis.One of the most remarkable aspects of tadpole development is the process of metamorphosis itself. As they transition from tadpoles to adult frogs, their bodies undergo drastic changes. Their tails gradually shorten and eventually disappear, while their lungs develop, allowing them to breathe air. This transformation is not only physical; it also involves changes in behavior and habitat. Adult frogs are terrestrial, whereas tadpoles are entirely aquatic. This shift necessitates a change in lifestyle, diet, and even social interactions.The study of tadpoles and their metamorphosis has significant implications for understanding ecological systems and evolutionary biology. Frogs and toads play crucial roles in their ecosystems, acting as both predators and prey. By studying their life cycles, scientists can gain insights into environmental health, as amphibians are often considered indicators of ecosystem quality. Changes in tadpole populations can signal shifts in water quality or habitat destruction, making them vital for conservation efforts.In addition to their ecological importance, tadpoles also serve as educational tools for teaching children about life cycles and biodiversity. Many schools incorporate live tadpoles into their science curricula, allowing students to observe the transformation firsthand. This hands-on experience fosters a deeper appreciation for nature and encourages curiosity about biological processes.Overall, the life of a tadpole is a testament to the wonders of nature. From their humble beginnings as tiny eggs to their eventual emergence as fully formed frogs, tadpoles exemplify the beauty of transformation and adaptation. Their journey is not just a biological phenomenon; it is a reminder of the intricate connections within our ecosystems and the importance of preserving the natural world. By understanding and protecting these remarkable creatures, we ensure that future generations will continue to marvel at the magic of tadpoles and their incredible life cycle.

在生物学的世界中，少有生物像蝌蚪一样迷人。这些青蛙和蟾蜍的水生幼虫经历了令人瞩目的转变，吸引着儿童和成人的想象力。蝌蚪的旅程始于雌性青蛙在池塘或小溪中产卵。每个卵最终孵化成一条小而扭动的蝌蚪，通常呈黑色或深棕色。在这个阶段，它们有一个长而扁平的尾巴，没有四肢，依靠尾巴在水中游泳。这个初始形态对它们的生存至关重要，因为它们必须在环境中导航以寻找食物并避开捕食者。随着蝌蚪的成长，它们主要以藻类和植物物质为食，这为它们提供了必要的营养，以便发展。在这一阶段，它们还表现出有趣的行为，例如成群游泳和探索周围环境。正是在这段时间，它们开始经历显著的生理变化。在几周或几个月的时间内，取决于物种和环境条件，蝌蚪开始长出腿部。后腿通常首先出现，随后是前腿，标志着它们变态的开始。蝌蚪发育的最显著方面之一是变态过程本身。当它们从蝌蚪转变为成年青蛙时，它们的身体经历了剧烈的变化。它们的尾巴逐渐缩短，最终消失，而肺部则发育，使它们能够呼吸空气。这种转变不仅是身体上的；它还涉及行为和栖息地的变化。成年青蛙是陆生的，而蝌蚪则完全是水生的。这种转变需要生活方式、饮食甚至社会互动的改变。对蝌蚪及其变态的研究对理解生态系统和进化生物学具有重要意义。青蛙和蟾蜍在其生态系统中发挥着至关重要的作用，既是捕食者也是猎物。通过研究它们的生命周期，科学家可以获得关于环境健康的见解，因为两栖动物通常被视为生态系统质量的指标。蝌蚪种群的变化可以表明水质或栖息地破坏的变化，使它们对保护工作至关重要。除了生态重要性外，蝌蚪还作为教育工具，教孩子们关于生命周期和生物多样性。许多学校将活蝌蚪纳入其科学课程，让学生亲眼观察转变。这种动手体验培养了对自然的更深层次的欣赏，并激发了对生物过程的好奇心。总的来说，蝌蚪的生命是自然奇迹的证明。从它们作为微小卵子的卑微起点，到最终作为完全形成的青蛙的出现，蝌蚪展示了转变和适应之美。它们的旅程不仅仅是生物现象；它提醒我们生态系统内部的复杂联系以及保护自然世界的重要性。通过理解和保护这些非凡的生物，我们确保未来的世代将继续惊叹于蝌蚪及其不可思议的生命周期的魔力。