由两叶构成

But in the + moiety, the three benzimidazole rings shared the whole space equally, the dihedral angel among them is about 120°, just like three fan blades of an airscrew, the molecular structure appear gear-like shape.

X-射线单晶衍射测试、红外、紫外等方法确定了三(2-苯并咪唑亚甲基)胺的Fe和Co配合物的结构，由晶体结构发现金属配位情况不同、配合物在结构上存在着差异，Fe为八面体构型，而Co为三角双锥构型；其次，两配合物中的苯并咪唑环间夹角不同，配合物中包含N2和N4的两个苯并咪唑环间夹角仅为9.41(0.11)，几乎构成一个平面，呈蝴蝶形；后者Co三个苯并咪唑环几乎平分了整个空间，它们之间的夹角约为120，呈三扇叶螺旋桨式构型，为齿轮形。

Here the authors examined the egg case silks from the orb web spider, Argiope amoena and Nephila clavata by the automatic amino acid analyzer, SEM, FTIR and electric single-fiber tensile apparatus with the goal of expanding our understanding of the relationship between the structure, mechanical performance and biological function of these unique biomaterials.

作者采用氨基酸自动分析仪、傅立叶转换红外光谱仪、扫描电镜和电子单纤强力仪对悦目金蛛和棒络新妇的卵袋丝进行了物理化学结构表征与力学性能的研究，结果表明两种蜘蛛卵袋均由微米级柱状腺丝、大壶状腺丝、亚微米级或纳米级葡萄状腺丝构成。

The result of analyzing the base content revealed that only the sequences from Buxus bobinieri have GC bias, especially at the third base of codes, and the GC content is more than 70%. All of molecular phylogenetic trees, based on the Beyesian, MP, and NJ methods, consisted of three major clades. Four sequences from Ceratophyllum demersum were grouped into a monophyletic clade (subfamily Ⅱ). Two sequences out of Trochodendron aralioides nested in subfamily Ⅲ. Another three sequences from Kingdonia uniflora interspersed among different subclades of subfamily Ⅰ.

用贝叶斯法、最大简约法和邻接法构建的CHS基因的分子系统树均由3个主要分支构成，其中一个分支由来自金鱼藻的4个序列聚在一起构成了subfamily Ⅱ，来自昆栏树的2个序列聚在一起网接于subfamily Ⅲ中；来自独叶草的3个序列分散于同一亚家族(subfamily Ⅰ)的不同分支中；而多数种的序列分散在相距较远的两个分支中，构成了两个主要的亚家族subfamily Ⅰ、subfamily Ⅲ。

The sister-group relationships are strongly supported between Petrosaviaceae and the remaining monocots (except for Acoraceae and Alismatales s.l.), between Dioscoreales and Pandanales, and between Commelinales and Zingiberales in the combined analyses of two genes and three genes.

继无叶莲科之后分化的类群形成两个大的分支：一支是由露兜树目和薯蓣目构成，二者形成姐妹群关系；另一支是由天门冬目、百合目和鸭跖草类复合群组成，三者之间的关系在单个序列分析和联合分析中不稳定，需要进一步扩大取样范围来确定。

Different from other two plants, there are red materials in upper epidermis of leaves of the A. mono living in Baicheng and Changchun. The red materials may relate to the secretion of salt. In A. mono living in Baicheng ,there exist palisade parenchyma with 2 layers cells.

白城地区的色木槭叶片主脉无花环状的韧皮纤维，白城和长春色木槭均有红色物质从叶片上表皮溢出，与另两种植物不同，这种物质可能与盐分的分泌有关，白城地区的色木槭叶的栅栏组织由两层细胞构成，而长春的色木槭则为一层栅栏组织。

I didn't watch TV last night, because it .

昨晚我没有看电视，因为电视机坏了。

Since this year, in a lot of villages of Beijing, TV of elevator liquid crystal was removed.

今年以来，在北京的很多小区里，电梯液晶电视被撤了下来。