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汉语拼音：sān yè chóng

节肢动物门的一纲。古生代非常繁盛，至中生代完全绝灭。体形扁宽，大多为卵形或椭圆形。背上有两条纵沟，把身体纵分为三叶，因而得名。生活在海中，多数营底栖生活，少数潜伏在泥沙中或过漂游生活。广泛分布于世界各地的古生代地层中。

• Yet if that is the right interpretation, it leaves the question of what evolved into the trilobites and their kind as mysterious as ever.

  不过倘若这样的解释是正确的，三叶虫和它的同类由何而来的问题将仍然神秘晦涩，一如往昔。

• Objective To determine the total sugars in water extract and acetone extract from Sanyechong tea.

  目的测定三叶虫茶的水提液和丙酮提取物中的总糖含量。

• Anyways, the company says, it's not built to save money, but to save time.

  不管怎样，该公司认为，研制（“三叶虫”）不是为了省钱，而是为了省时间。

• The Trilobite can clean a room on its own, using sound waves to feel its way around.

  “三叶虫”可以利用声波探路，从而自己打扫房间。

• Two others of these trilobite fossils have been found in the same area.

  在同一地区还发现了另外两块这些三叶虫化石。

• The Kaili formation in Eastern Guizhou, China is mainly made up of silty mudstone and shales abundant in trilobites.

  贵州黔东地区中-下寒武统凯里组主要由粉砂质泥岩、页岩及灰岩组成，富产三叶虫。

• Added the trilobite, "Yup, this evolution thing is going great. "

  这只三叶虫又补充了一句“恩，进化这事真是太帅了”。

• Tadpole shrimp have outlived dinosaurs, trilobites and mammoths.

  蝌蚪虾比恐龙，三叶虫，猛犸象活得还长。

• Trilobites are an extinct group of sea-dwelling arthropods that are distantly related to crabs, scorpions and beetles.

  三叶虫是一种早已灭绝的海生节肢动物，是螃蟹、蝎子与甲壳虫等动物的远亲。