n.无脊椎动物
adj.无脊骨的，软弱无能的

原形：invertebrate复数：invertebrates

Invertebrates make up the vast majority of animal species on Earth, with over 95% of all known organisms belonging to this category.
无脊椎动物构成了地球上大多数动物种类，已知的生物中超过95%属于这个类别。
Insects, like ants and butterflies, are the most numerous invertebrates, contributing significantly to ecosystems as both predators and decomposers.
昆虫，如蚂蚁和蝴蝶，是无脊椎动物中最丰富的，它们在生态系统中作为捕食者和分解者起着重要作用。
Crustaceans, such as crabs and lobsters, are an example of invertebrates with hard exoskeletons providing them protection.
像螃蟹和龙虾这样的甲壳类动物是无脊椎动物的例子，它们有硬外壳提供保护。
The earthworm is a simple invertebrate, playing a crucial role in soil aeration and nutrient cycling.
蚯蚓是一种简单的无脊椎动物，对土壤通气和养分循环起着关键作用。
Many invertebrates, like jellyfish, have a radial symmetry, meaning their body parts are arranged around a central axis.
许多无脊椎动物，如水母，具有辐射对称，即身体部分围绕中央轴线排列。
Some invertebrates, like octopuses, possess remarkable intelligence and problem-solving abilities, challenging our understanding of animal cognition.
一些无脊椎动物，如章鱼，拥有惊人的智慧和解决问题的能力，这挑战了我们对动物认知的理解。
Invertebrates serve as a vital food source for many vertebrates, including birds and fish.
无脊椎动物是许多脊椎动物的重要食物来源，包括鸟类和鱼类。
Aquatic invertebrates, like mollusks, contribute to the biodiversity of marine ecosystems.
水生无脊椎动物，如软体动物，丰富了海洋生态系统的多样性。
Invertebrates play a significant role in the pollination process, helping plants reproduce.
无脊椎动物在授粉过程中发挥着重要作用，帮助植物繁殖。
The decline in insect populations, a type of invertebrate, has raised concerns about the health of ecosystems and agriculture.
昆虫（一种无脊椎动物）种群的下降引起了对生态系统健康和农业的担忧。