脊索动物

Homo sapiens, along with all mammals, are chordates because they possess a notochord during their embryonic development.
人类与所有哺乳动物都是脊索动物，因为它们在胚胎发育期间具有脊索。
The tunicates, also known as sea squirts, are a group of marine chordates that spend most of their adult life sessile and filter-feeding.
薄膜动物，又称海鞘，是一类主要以固着生活方式和过滤食物为生的海洋脊索动物。
The vertebrates, such as fish, birds, reptiles, amphibians, and mammals, represent the largest and best-known subphylum within the phylum Chordata.
鱼、鸟、爬行动物、两栖动物和哺乳动物等脊椎动物代表了脊索动物门中最大且最知名的亚门。
In chordates, the nerve cord runs ventrally to the notochord in the early stages of development.
在脊索动物中，在早期发育阶段，神经索沿着脊索的腹侧延伸。
Whales, despite being aquatic creatures, belong to the class Mammalia, which is part of the phylum Chordata.
鲸鱼虽然是水生生物，但属于哺乳纲，归入脊索动物门。
During embryonic development, chordates develop a series of gill slits, which in some groups persist into adulthood and function as respiratory structures, like in sharks.
在脊索动物的胚胎发育过程中，会形成一系列鳃裂，在某些群体中，这些鳃裂会在成年后保留并作为呼吸结构，如鲨鱼的情况。
The amphioxus, or lancelet, is an important model organism for studying the ancestral characteristics of chordates due to its simple body plan and close evolutionary relationship to our last common ancestor.
文昌鱼（或称枪乌贼）因其简单的身体构造和与我们共同祖先之间密切的进化关系而成为研究脊索动物原始特征的重要模型生物。
The pharyngeal arches in chordates give rise to various structures, including bones and muscles that support the jaw and hearing organs in higher vertebrates.
脊索动物中的咽弓会分化出多种结构，包括支撑高等脊椎动物颌骨和听觉器官的骨骼和肌肉。
In chordates, the endostyle gland, present in tunicates and some larval forms, may be the precursor to the thyroid gland found in vertebrates.
在脊索动物中，存在于薄膜动物以及一些幼虫形态中的内柱腺可能是高等脊椎动物甲状腺的前身。
The presence of a post-anal tail at some stage in their life cycle is another key characteristic shared by chordates.
脊索动物在其生命周期的某个阶段拥有尾索是其另一个关键特征。