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被囊动物
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被囊动物
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被囊动物
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tunicata
被囊动物
一类滤食性海洋动物,因其体表披有一层植物性多糖纤维素(polysaccharides related to cellulose)的被囊(tunic)而得名。由于幼体尾部具有脊索(notochord)结构,又称尾索动物。
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mass media
Mass Media Informing Advertising
mass memory
mass-metallicity relation
mass metrology
mass moment
mass moment control
mass moment of inertia
mass motion
mass movement
mass nucleon transfer
mass number
mass-number conservation
mass of a chain
mass of a current
mass of an r-vector
mass of a polyhedral chain
mass of a unitary representation
mass of data
mass of substance
mass of the atom
mass of the electron
mass of the neutron
mass of the nucleus
mass of the proton
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