| 词汇 | urchin |
| 释义 | urchin noun[ C ] old-fashioned or humorousuk /ˈɜː.tʃɪn/ us /ˈɝː.tʃɪn/ a small child, especially one who behaves badly and is dirty or untidily dressed: （尤指肮脏淘气的）小孩 a street urchin街头顽童 a child childWhen I was a child the summers seemed to go on for ever. boyThere's a new boy in my class. girlThe girl's name is Sally. kidI'm off to pick up the kids from school. kiddieI saw her with a little kiddie in a pushchair. little oneThe little ones must be hungry by now. Children & babies ankle-biter arrival babe babe in arms baby children comfort blanket crawler designer baby devil munchkin neonate new addition nipper only child tantrum teethe tiddler tike toddler urchin | American Dictionaryurchin noun[ C ] datedus/ˈɜr·tʃən/ a small child who is badly dressed and dirty: urchins playing in the street Examples of urchinurchin Activation of amino acid uptake at fertilization in the sea urchin egg. A variety of methods has been developed to prevent formation of fertilisation membranes in sea urchin eggs. The hyaline layer is a collagen-containing extracellular matrix in sea urchin embryos and reaggregating cells. Most of this work has been done with model organisms, especially sea urchins, but many of the principles governing fertilisation appear to be generally applicable. Visually he was more iconic than the other street urchins in the comic and was the only character to look at and address readers directly. In the present study about 20% of mouse oocytes were activated following injection of 10 sea urchin spermatozoa. A localized zone of increased conductance progresses over the surface of the sea urchin egg during fertilization. Proteolysis of the major yolk glycoproteins is regulated by acidification of the yolk platelets in sea urchin embryos. In animal systems, studies on the activation of sea urchin and clam eggs have also found changes in enzyme activity and location. Localisation of fluorescently labelled calmodulin in living sea urchin eggs during early development. Changing localizations of site-specific surface antiperhaps sequential patterns of gene expression during gens during sea urchin spermiogenesis. The sea urchin egg is a model for such studies. For example, in sea urchin oocytes, calciuminduced cortical granule exocytosis leads to the formation of a zygote with a mosaic plasma membrane. Characteristics of individual repetitive sequence families in the sea urchin genome studied with cloned repeats. Localization and possible role of molecules acetylcholinesterase in sea urchin embryos. 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. |
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