立克次氏体是一种细菌，这种细菌可引起多种疾病，并通过吸血节肢寄生动物传播。
Rickettsia is a bacterium which can cause many diseases that are transmitted by blood-sucking parasitic arthropods.
蝴蝶和虾以及其他长有节足的动物属于节肢动物门。
Butterflies and shrimps and other animals with jointedlegs belong to Arthropoda.
日本的蟹型蜘蛛是地球上最大的节肢动物，它们的腿被认为能够长到12英尺长。
The Japanese Spider Crab is the biggest arthropod on Earth — their legs are believed to grow up to 12 feet long.
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