偶氮杂环丙烷是一类重要的 、 环内张力颇大的化合物.The diazirines are interesting , highly strained ring systems.当微量变形能使加载条件发生颇大改变时,就会产生颇大的差异.Appreciable differences may occur, however, when small deformations considerably alter the loading cond...
Mesenchyme -- embryonic c . t . with multipotential cells . The stellate cells are beginning to form fibers.间充质 --- 胚胎时期结缔组织,含有多种分化潜能的细胞这种星形细胞可合成纤维....
The coats, made of polythene sheet 0.05 millimetre thick, are fitted on the sheep after shearing.这种绵羊穿的罩衣, 是用0.05毫米厚的聚乙烯薄膜制成的,在剪完羊毛之后给羊穿上.In the Hebrides they shear their sheep later than anywhere else.在赫伯里兹，剪羊毛的时间比其他任何地...