| 单词 | aster |
| 释义 | aster noun[C] uk/ˈæs.tər/us/ˈæs.tɚ/agardenflowerthat is usuallypinkorpurple, with manylong,thinpetals 紫苑花 Glenn Waterman / EyeEm/GettyImages Flowers & flowering plants
Examplesofasteraster The peripheral asters come into close apposition with the cortex. From theCambridge English Corpus Indeed, the antibody stained the asters and (more strongly) the vesicular components attaching to the periphery of the mitotic apparatus. From theCambridge English Corpus Although the paternal centrosome duplicated, the maternal centrosome in the centre of the eggasterdid not divide. From theCambridge English Corpus The microtubules of the maleasterare arranged in a funnel-shaped array, all stretching to the fertilisation area in the cortex. From theCambridge English Corpus Migration of the asters sets one in the centre of the egg and the other in the cortex. From theCambridge English Corpus Microtubules of both asters reaching into the cortex cross each other cirumferentially. From theCambridge English Corpus This indicates that neitherasteris strongly attached to the cortex until the end of metaphase. From theCambridge English Corpus The lower ('vegetal') spindle pole produces a much largerasterthan the upper ('animal') spindle pole. From theCambridge English Corpus Again, the microtubules of the centralasterrun along the pronuclear surface and reach the cell cortex. From theCambridge English Corpus All microtubules associate with the meiotic spindle and asters. From theCambridge English Corpus However, fully developed microtubule asters were not observed. From theCambridge English Corpus These asters grow until the male pronucleus reaches its female counterpart and disintegrate afterwards. From theCambridge English Corpus A small microtubuleasterwas observed in association with decondensed chromatin following nuclear transfer, suggesting the introduction of a somatic cell centrosome. From theCambridge English Corpus In early metaphase, a bipolar spindle with broad poles and devoid of asters is formed. From theCambridge English Corpus At metaphase the two equal-sized asters span the entire egg in a symmetrical arrangement. From theCambridge English Corpus 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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