trilobites and dinosaurs are extinct.
三叶虫和恐龙已经绝种。
the trilobite's thorax has a variable number of articulated segments.
三叶虫的胸部有一些铰接部分。
The new framework, comprising a pre-trilobite series and three trilobite-dominated series, reflects the major evolutional stages of the life on Earth during Cambrian Period.
新的划分方案包括1个“前三叶虫统”和3个“三叶虫优势统”，反映了寒武纪生命发展的主要阶段。
On the rank that reachs mummy from cranium of trilobite, dinosaurian egg, pithecanthrope, crockery, remains, get through gives birth to the channel that is born not to cease.
从三叶虫、恐龙蛋、猿人头盖骨、瓦器、废墟及木乃伊的列队上,打通生生不息的隧道。
The trilobite fossil was carefully preserved in the museum.
三叶虫化石被小心地保存在博物馆里。
Scientists study trilobites to learn more about ancient marine life.
科学家研究三叶虫以了解更多关于古代海洋生物的知识。
Trilobites were one of the earliest forms of life on Earth.
三叶虫是地球上最早的生命形式之一。
The trilobite's distinctive shape makes it easily recognizable.
三叶虫独特的形状使其容易辨认。
Paleontologists often find trilobite fossils in sedimentary rocks.
古生物学家经常在沉积岩中发现三叶虫化石。
Trilobites lived in the oceans over 500 million years ago.
三叶虫生活在5亿多年前的海洋中。
The trilobite's exoskeleton helped protect it from predators.
三叶虫的外骨骼帮助它抵御捕食者。
Trilobites were arthropods with segmented bodies.
三叶虫是具有分节体的节肢动物。
The trilobite's eyes were made of calcite crystals.
三叶虫的眼睛是由方解石晶体构成的。
Collectors often seek out rare trilobite specimens for their collections.
收藏家经常寻找稀有的三叶虫标本用于他们的收藏。
trilobites and dinosaurs are extinct.
三叶虫和恐龙已经绝种。
the trilobite's thorax has a variable number of articulated segments.
三叶虫的胸部有一些铰接部分。
The new framework, comprising a pre-trilobite series and three trilobite-dominated series, reflects the major evolutional stages of the life on Earth during Cambrian Period.
新的划分方案包括1个“前三叶虫统”和3个“三叶虫优势统”，反映了寒武纪生命发展的主要阶段。
On the rank that reachs mummy from cranium of trilobite, dinosaurian egg, pithecanthrope, crockery, remains, get through gives birth to the channel that is born not to cease.
从三叶虫、恐龙蛋、猿人头盖骨、瓦器、废墟及木乃伊的列队上,打通生生不息的隧道。
The trilobite fossil was carefully preserved in the museum.
三叶虫化石被小心地保存在博物馆里。
Scientists study trilobites to learn more about ancient marine life.
科学家研究三叶虫以了解更多关于古代海洋生物的知识。
Trilobites were one of the earliest forms of life on Earth.
三叶虫是地球上最早的生命形式之一。
The trilobite's distinctive shape makes it easily recognizable.
三叶虫独特的形状使其容易辨认。
Paleontologists often find trilobite fossils in sedimentary rocks.
古生物学家经常在沉积岩中发现三叶虫化石。
Trilobites lived in the oceans over 500 million years ago.
三叶虫生活在5亿多年前的海洋中。
The trilobite's exoskeleton helped protect it from predators.
三叶虫的外骨骼帮助它抵御捕食者。
Trilobites were arthropods with segmented bodies.
三叶虫是具有分节体的节肢动物。
The trilobite's eyes were made of calcite crystals.
三叶虫的眼睛是由方解石晶体构成的。
Collectors often seek out rare trilobite specimens for their collections.
收藏家经常寻找稀有的三叶虫标本用于他们的收藏。
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