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In this final self-portrait, the painter represents himself by this black form, like a silhouette of himself sitting in his armchair, surrounded by the pleasures which have enriched his life: the yellow petals fluttering away have the gaiety of musical notation; the green odalisque symbolises the Orient, while a dancer pays homage to the female body.
在这最后的自画像,画家代表本黑色形成自己就像一个人影,他对自己坐在扶手椅,由具有丰富了他的生活乐趣:在高高飘扬的距离有乐谱欢乐黄色花瓣包围;绿色宫女象征东方,而舞者致敬的女性身体。
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Floral organ determination is best explained by the ABCDE model postulated by genetic studies of Arabidopsis thaliana. Sepals are determined by A and E class genes; petals are determined by A, B, and E; stamens by B, C, and E; and carpels by C and E class genes. A, B, C, and E class gene lineages are known having duplicated several times during the evolution of angiosperms. One of the noted major duplication events occurred in the origin of the early angiosperms, leading to the formation of subgroups of B/C/D/E class. Another one occurred near the basal eudicots and gave rise to further subgroups in A/B/C/D/E class genes among core eudicots. The phylogenetic position of the family Buxaceae is located right where the second major duplication of ABCDE genes might have occurred, which is supported by multiple gene (nuclear 18S rDNA, chloroplast rbcL and atpB) phylogenetic analyses.
目前经由模式植物阿伯芥的研究,建花部器官决定基因的调控,即花萼由A、E 群基因共同决定,花瓣由A、B、E 群基因,雄蕊由B、C、E 群基因,而心皮由C 和E 群基因决定。A、B、C、E 四群基因在被子植物的演化过程中发生过次的复制事件,其中比较重要的一次发生在早期被子植物演化出之时,形成B/C/D/E 群基因的次系群;另一次复制事件则发生在真双子植物基群附近,形成仅於核心真双子植物的A/B/C/D/E 群基因之次系群。
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Moreover, the A-B-A triblock copolymer solution in a selective solvent, which is good for the block B, was explored. It was observed that the flowerlike micelles were formed, in which the central block B took on a loop conformation and the two end A blocks became a part of the micellar core. It was found that some of the soluble middle B blocks served as extended bridges between the small clusters by the poorly solvated end A blocks.
在A-B-A三嵌段共聚物溶液体系中,溶剂是链段B的良溶剂,是链段A的不良溶剂,此时我们得到了花型结构的胶束,其中花心是由链段A聚集而成,花瓣是由链段B形成的,而且在体系中也发现了有些胶束间存在着桥,并且在浓度很高时,体系出现了凝胶现象。
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Theoretical analysis reveals that the formation of flower-like splats results from the interaction of surface tension, inhomogeneity of thermal contact resistance between flattening drop and substrate and substrate crater. The formation of the craters on the substrate is mainly controlled by substrate melting.
理论分析表明,&花瓣状&层片的形成是熔体表面张力、熔体与基底接触热阻的不均匀性和基底凹坑相互作用的结果;基底凹坑的形成主要由基底熔化所控制。
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petaloid:花瓣似的, 花瓣状的 由花瓣形成的
solar plexus [解]腹腔神经丛 | petaloid 花瓣似的, 花瓣状的 由花瓣形成的 | guide nose 导尖, 导突, 导鼻
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solar plexus:[解]腹腔神经丛
drum box testing machine 颠落试验机 | solar plexus [解]腹腔神经丛 | petaloid 花瓣似的, 花瓣状的 由花瓣形成的
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Metachlamydeae:后生花被亚纲
离瓣花亚纲恩格勒系统分科目录 (二)合瓣花亚纲 Sympetalae 本亚纲又称后生花被亚纲(Metachlamydeae),主要特征是花瓣多少连合成合瓣花冠. 花冠形成了各种形状,如漏斗状、钟状、唇形、管状、舌状等,由辐射对称发展到两侧对称. 花冠各式的连合,