The cells of the bundle sheath that surround the vascular tissues are large and contain specialized elongated chloroplasts that do not contain grana , but form starch grains 它的特点为：围绕在维管组织外层的维管束薄壁细胞较大，并含有较大的叶绿体，这些叶绿体中不含基粒，但形成淀粉粒。
In the outermost room were half a dozen exceptional people who had had , for a few years , some vague misgiving in them that things in general were going rather wrong 它扭曲了随侍大人的每一个人。在最外层的屋子里有那么六七个与众不同的人若干年来就模糊地感到不安，认为总的说来形势不妙。
The outer layer of the barbules consists of a two - dimensional crystal framework made of melanin rods connected by keratin ? a fibrous protein ? in a lattice pattern 外层的小羽枝由一个二维的结晶状结构组成，由黑色素杆状细胞构成，与角蛋白相连? ?一种纤维状蛋白质? ?在一种格子式样图案里面。
Now , however , researchers at canada ' s national research council in ottawa have produced a three - dimensional scan of the outermost electron orbital around a nitrogen molecule 不过，位于渥太华的加拿大国家研究委员会，其研究人员最近却针对氮分子最外层的电子，拍摄出其绕行轨道的三维立体影像。
Therefore , radiation transport is efficient enough to bring the energy almost all the way to the stellar surface . hence the star will have a radiative shell and a convective core 在这些星体较外层的气体仍然很热和比较透明所以辐射传播是一个有效的传递方法结果是这些恒星会有一个对流核心和辐射外壳。
When we get sick , it s just like having a hole poked in the layer of protective energy , so that the illness can directly enter our bodies , through the hole . that s how we get sick 病况发生时，就如同我们外层的护罩被戳穿了一个洞，病就直接由此洞进入我们的身体，所以才会生病如果我们外面的气体很完整，病根本就无从入侵。
The expressions most deeply nested in parentheses are evaluated first , followed by the next most deeply nested , and so on to the least deeply nested , and finally the expressions outside parentheses 将首先计算嵌套在括号中最深层的表达式，然后计算下一个嵌套最深的表达式，依此类推计算到嵌套在最外层的表达式，最后计算括号外部的表达式。
The amino acid glutamate and other neurotransmitters are released by nerve cells and exert their effects through special protein molecules called receptors that are located in the outer layers of adjacent nerve cells 动物神经细胞会分泌出?氨酸(一种氨基酸)及其他神经介质，这些神经介质利用邻近神经细胞外层的特别感受器，把讯息传到身体各部分。
The endografts that he and his associates are currently using are made of dacron supported by a nitinol stent skeleton , " which expands and presses the fabric graft across the area of the tear , " the surgeon said 他和他的同事目前使用的内支架是由镍钛合金的支架结构、外层的涤纶所构成， “这种结构使得这种纤维性支架可以伸缩自如，从而到达撕裂部位”这名外科医生说。
You think that this seed can be just put into the mud and you can wait until it sprouts , but it will not sprout if you just put it in the mud , because the lotus seed is made of a kernel inside and also a very hard skin outside 你们会想当然地把这粒莲子埋入泥土，然后就坐等它发芽，但是如果你们做的仅此而已，它就不会发芽，因为莲子是由内层的莲核和外层的硬皮构成。
