| 词汇 | annelid |
| 释义 | annelid noun[ C ] biology specializeduk /ˈænəlɪd/ us /ˈænəlɪd/ a type of worm whose body is divided into several parts环节动物 Worms, snails, slugs & similar animals centipede earthworm echinococcus escargot flatworm gastropod hookworm leech limacine millepede minibeast nematode pill bug roly-poly roundworm slug snail woodlouse worm The skeleton is a thickening of the horny cuticle of the annelid on the surface of each segment. Then the annelids settled to the bottom and crept, and all their descendants remained creeping forms. Then the flat worms and mollusks took to a creeping mode of life, while the annelids and vertebrates still swam. Thus in the advance of annelids to insects the muscular system increases in relative bulk, and absolutely in complexity. To form its skeleton the crab had only to thicken the cuticle already present in the annelid. Examples of annelidannelid Secreting a dwelling tube is a common phenomenon among phoronid, pogonophoran and annelid worms. Secreted products among the non-pogonophoran annelids range from mucus to calcium carbonate. With the exception of a few marine sanguinicolids that use annelids, a mollusc is the required first intermediate host for all flukes. As they note, however, recent molecular evidence suggests this intriguing group may have nothing to do with the annelids, let alone the polychaetes. Invertebrates collected have included varieties of sponge, anemone, annelid, mollusc, crustacean, asteroid, ophiuroid, echinoid, holothurioid and tunicate. Palaeoscolecid worms may be nematomorphs rather than annelids. Another hot topic in the last few years has been the phylogenetic position of the brachiopods, with decisive evidence placing them close to the annelids and molluscs (as lophotrochozoans). The young toads and the adult toads consume insects, such as flies and beetles, shrimp and larvae; but also annelid worms and terrestrial arthropods. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. As carnivores, they will readily eat many types of small annelid worms, insects, and crustaceans, and they will also eat standard flake foods. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Crustaceans, including crabs, prawns, amphipods and copepods, are commonly taken, as are a number of polychaete and annelid worms. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. The reedfish is nocturnal, and feeds on annelid worms, crustaceans, and insects. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. The extent of this type of evolution within the superphylum will be revealed by the crustacean, annelid, and molluscan genome projects currently in progress. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. As a schmutzdecke ages, more algae tend to develop, and larger aquatic organisms may be present including some bryozoa, snails and annelid worms. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. This deep ocean pelagic (free-swimming) annelid has modified bioluminescent gills that can be cast off from an individual. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. The basic annelid form consists of multiple segments. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. These examples are from corpora and from sources on the web. Any opinions in the examples do not represent the opinion of the Cambridge Dictionary editors or of Cambridge University Press or its licensors. |
| 随便看 |
|
反思网英语在线翻译词典收录了377474条英语词汇在线翻译词条，基本涵盖了全部常用英语词汇的中英文双语翻译及用法，是英语学习的有利工具。