词汇 | yolk |
释义 | yolk noun[ C or U ] uk /jəʊk/ us /joʊk/ the yellow, middle part of an egg: 蛋黄 I like eggs lightly cooked so that the yolk is still runny.我喜欢煮得嫩些的鸡蛋,这样蛋黄还是溏心的。 Separate the yolks from the whites.将蛋黄从蛋清中分离出来。 See also egg yolk Compare egg white chengyuzheng/iStock/Getty Images Plus/GettyImages Dairy products & eggs albumen beurre noisette brown butter butter butterfat dairy dairy milk Devonshire cream double cream dried milk lactic light cream milk fat mylk oat milk sunny side upidiom UHT ultra-pasteurized unhomogenized unpasteurized yolk | American Dictionaryyolk noun[ C/U ] us/joʊk/ biology the yellow middle part of an egg, which provides food for a developing animal Examples of yolkyolk Within the sprawling text is encapsulated what some readers may regard as the yolk of the egg, if not the pearl in the oyster. The yolk follicles have no special arrangement, being generally in the form of widely distributed net formations. The visceral yolk sac, allantois and amnion were dissected away from the fetal material and excess fluid was wiped clear prior to measuring the weight. The exocoelomic cavity contains the yolk sac, which is connected to the primitive digestive tract and fetal circulation. Ultrastructural analyses demonstrated that the blastomere cytoplasm contains a large number of mitochondria and vesicles, several filled with yolk material. The examination of octanol-treated vitellogenic oocytes failed to reveal the presence of labelled yolk spheres. The trend was in the order yolk sac endoderm epiblast derivatives > placenta. Fully grown yolk platelets are the destination of most of the proteinaceous nutritive material to be internalised. No signs of resorption of yolk were detected in any test. The transverse yolk ducts unite in front of the ovary. Three oocyte membranes (cleaned of yolk without disturbing the cytoplasmic layer) were spread on a polystyrene plate and weighted down with metallic rings. Another relevant aspect to be considered in the study of vitellogenesis is the incorporation of lipids into yolk platelets. In the oocyte cortex were observed coated pits, coated vesicles, dense tubules, multivesicular bodies and primordial yolk spheres. If the cell division of the twins was late, just before conjoined twins would occur, a single yolk sac would be apparent on the sonogram. In the six eggs thus examined, all rotated their yolk mass towards the same side of the egg (< 90°) as the maturation spot meridian. 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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