dorsal fin

简明释义

空气垂直舵;稳定器

英英释义

例句

1.In many fish species, the size and shape of the dorsal fin can indicate their health and vitality.

在许多鱼类中，背鳍的大小和形状可以表明它们的健康和活力。

2.Marine biologists study the shape of the dorsal fin to identify different species of fish.

海洋生物学家研究背鳍的形状来识别不同种类的鱼。

3.The whale raised its dorsal fin before diving deep into the ocean.

鲸鱼在深潜入海之前抬起了它的背鳍。

4.The shark's dorsal fin was visible above the water, indicating its presence nearby.

鲨鱼的背鳍在水面上可见，表明它就在附近。

5.A strong wave knocked the surfer off balance, and he fell just as a dolphin leaped with its dorsal fin out of the water.

一阵强浪把冲浪者撞得失去平衡，他刚好摔倒，就看到一只海豚跃出水面，露出了它的背鳍。

作文

The ocean is a vast and mysterious place, home to countless species of marine life. Among these creatures, some of the most fascinating are the sharks. Sharks have long intrigued humans due to their unique adaptations and behaviors. One of the most identifiable features of a shark is its dorsal fin, which plays a crucial role in its swimming and hunting abilities. The dorsal fin is located on the back of the shark and serves several important functions. Firstly, it helps stabilize the shark while swimming, allowing it to maintain balance and direction in the water. This stability is essential for a predator that needs to make quick movements when chasing prey. Secondly, the dorsal fin can also be a visual signal to other marine animals. When a shark is spotted swimming near the surface, its dorsal fin often breaks the surface of the water, alerting other creatures to its presence. This can be both a warning and a sign of dominance in the underwater ecosystem. Interestingly, the size and shape of the dorsal fin can vary significantly among different shark species. For example, the great white shark has a large, triangular dorsal fin that is easily recognizable, while the hammerhead shark has a more elongated and uniquely shaped dorsal fin. These differences not only help in identification but also reflect the different habitats and hunting strategies of each species. In addition to stabilization and signaling, the dorsal fin can also play a role in thermoregulation. Some sharks have the ability to regulate their body temperature, and the dorsal fin can assist in this process by absorbing or releasing heat as needed. This adaptation allows them to thrive in various temperatures of ocean water, expanding their range and hunting grounds. Furthermore, the dorsal fin is not just an anatomical feature; it can also be a source of inspiration for scientists studying biomechanics. By examining how the dorsal fin functions, researchers can gain insights into improving designs in engineering, such as creating more efficient underwater vehicles. The study of the dorsal fin and its functions highlights the intricate connections between biology and technology. In conclusion, the dorsal fin is more than just a distinctive feature of sharks; it is a vital component of their anatomy that aids in stability, communication, thermoregulation, and even inspires technological advancements. Understanding the significance of the dorsal fin enhances our appreciation for these magnificent creatures and the complex ecosystems they inhabit. As we continue to explore and learn about the ocean, the dorsal fin will remain a symbol of the beauty and adaptability of marine life.

海洋是一个广阔而神秘的地方，栖息着无数种海洋生物。在这些生物中，鲨鱼是最令人着迷的生物之一。由于其独特的适应性和行为，鲨鱼长期以来吸引着人类的关注。鲨鱼最显著的特征之一是它的dorsal fin（背鳍），这在它的游泳和捕猎能力中起着至关重要的作用。dorsal fin位于鲨鱼的背部，具有多个重要功能。首先，它帮助鲨鱼在游泳时保持稳定，使其能够在水中保持平衡和方向。这种稳定性对需要快速移动追逐猎物的捕食者至关重要。其次，dorsal fin也可以作为其他海洋动物的视觉信号。当鲨鱼被发现游到水面附近时，它的dorsal fin通常会突破水面，警告其他生物注意它的存在。这既可以是警告，也可以是在水下生态系统中展示主导地位的标志。有趣的是，不同鲨鱼种类的dorsal fin的大小和形状可能会有显著差异。例如，巨齿鲨有一个大而三角形的dorsal fin，易于识别，而锤头鲨则有一个更长且独特形状的dorsal fin。这些差异不仅有助于识别，还反映了每种的不同栖息地和捕猎策略。除了稳定性和信号功能外，dorsal fin还可以在温度调节中发挥作用。一些鲨鱼具有调节体温的能力，而dorsal fin可以通过根据需要吸收或释放热量来辅助这一过程。这种适应性使它们能够在各种温度的海水中生存，扩大了它们的活动范围和捕猎区域。此外，dorsal fin不仅仅是一个解剖特征；它也是科学家研究生物力学的灵感来源。通过研究dorsal fin的功能，研究人员可以获得改进工程设计的见解，例如创造更高效的水下车辆。对dorsal fin及其功能的研究突显了生物学与技术之间的复杂联系。总之，dorsal fin不仅是鲨鱼的一个独特特征；它是鲨鱼解剖结构的重要组成部分，有助于稳定、沟通、温度调节，甚至激发技术进步。理解dorsal fin的重要性增强了我们对这些壮丽生物及其栖息的复杂生态系统的欣赏。随着我们继续探索和学习海洋，dorsal fin将始终是海洋生物美丽和适应性的象征。