查询词典 root

The VCL method and the displacement method are used to calculate the Stress Intensity Factors of semi-elliptical surface crack at the root of pipe screws, on the basis of which a simplified calculating model for screws contact is put forward so as to analyse the fracture intensity for oil drill pipe screw coupling. For the semi-elliptical surface crack with different shape and deep ratio at the root of female and male screws and the corner of male flange, the SIF has been studied systemically under inter-pressure, tension, bend and torsion loads and the approximate formulas encluding the structure parameters of oil drill pipe screw coupling, deep ratio and the shape parameters of surface crack are developed.

对工程实际中的多种石油钻杆接头螺纹连接件，就公螺纹齿根、母螺纹齿根、公螺纹台阶转角处存在的不同形状、不同厚度比的半椭圆表面裂纹，在拉伸、内压、弯曲、扭转多种载荷作用下的应力强度因子作了系统研究，在大量有限元计算基础上，建立了包含接头结构参数、裂纹形状、厚度比在内的近似计算公式。

In macroscopic, the sudden and rapid rise of rural juvenile delinquency rate in social transition has profound social root and intrinsic mechanism. The social polarization caused by city - countryside - dual society structure is the social root of rural juvenile delinquency, and the existence of each kind of social exclusion is the intrinsic mechanism; In medium reasons, the rural juvenile delinquency is the result of family, school, companion community, mass media as well as other bad affection factors; In microscopic, the rural juvenile delinquency is inseparably related to rural juveniles low degree of schooling, the lack of legal consciousness, the desalination of morality and the lost of value orientation and so on.

从宏观上，社会转型期农村未成年人犯罪率的急剧上升、迅猛增长有着深刻的社会根源和内在机理，由社会发展失衡和城乡二元社会结构所导致的社会极化是农村未成年人犯罪的社会根源，各种社会排斥的存在是农村未成年人犯罪的内在机理；从中观上，农村未成年人犯罪是家庭、学校、同伴群体和大众传媒等社会化机构的不良影响所致；从微观上，农村未成年人自身文化程度的低下、法律意识的淡薄、道德观念的淡化和价值取向的迷失等与其犯罪也有着密不可分的联系。

PASSION Essential Oil: Sassafras 34、热情精油:檫树 Sassafras is often found in herbal teas and is a root used in making root beer.

檫树常在草本茶中找到，是一种用于制作『树根汽水』的草根。

In coronary heart NoⅡ decoctions, that ligusticum wallichi add white peony root, safflower and root of red sage don′t affect the blood drug concentration and AUC of FA.

在冠心Ⅱ号中川芎配伍芍药、红花和丹参等并不影响体内FA的血药浓度及其生物利用度。

Good nurseries will lift trees or root-prune them to establish a nicely fibrous root system.

良好的照料包括拔起树或树根，对它们进行修剪，建立一个良好的纤维状的根系。

Results show that root elongation and the mitotic index of the root tip cells were significantly decreased with the increasing Cd concentration and treatment duration.

结果表明，随着Cd浓度增加和处理时间延长，水稻幼苗根的生长及根尖细胞有丝分裂指数明显降低。

Root growth of barnyardgrass was significantly inhibited by aqueous extract of root, sheath and leaf of rice.

两个化感水稻对稗草幼苗根的抑制更强于对苗高的抑制。

Immunohistochemistry revealed the specific localization of the IGF-I receptor in Hertwigs epithelial root sheath in the tooth root.

通过免疫组织化学方法显示了IGF-I受体在牙根赫特威氏上皮根鞘上的特殊定位。

Hair follicle is an important and complex epidermal appendage of skin, composed of hair shaft, inner root sheath and outer root sheath.

毛囊是皮肤重要而复杂的附属结构，从内向外依次由毛干、内根鞘和外根鞘组成。

The hair shaft and inner root sheath move together as the hair grows toward the surface: the outer root sheath remains fixed in position.

毛干和内根鞘当到达体表时融合在一起：外根鞘仍然保持在原来的位置。

In the negative and interrogative forms, of course, this is identical to the non-emphatic forms.

。但是，在否定句或疑问句里，这种带有"do"的方法表达的效果却没有什么强调的意思。

Go down on one's knees;kneel down

屈膝跪下。。。下跪祈祷