Generally, chemical bonds exist between open-shell species (strong covalent bonds); or between closed-shell species (strong ionic bonds), if they carry opposite electric charges.
通常,化学键存在于两个开壳层原子或原子团之间(共价键)或两个带相反电荷的闭壳层离子之间(离子键),两个中性或相同电性的闭壳层结构之间一般不存在强烈的化学作用,即不会成键。
Based on the fundamental equations of thermal elasticity, the state equation for a orthotropic laminated cylinder with clamped edges under thermal loads is established by introducing state space theory.
从热弹性力学的基本方程出发，引入状态空间理论，建立了具有固支边的正交异性叠层闭口柱壳在温度荷载作用下的状态方程，并给出适用于任意厚跨比的解析解。
Axisymmetric thermal stresses for closed laminated cylindrical shell of arbitrary thickness;
任意厚度层合闭口柱壳的轴对称温度应力
Based on weak formulation of mixed state equations including boundary conditions for laminated cylindrical shells, equations of mixed state for thermal stresses of a closed laminated cylindrical shell with two clamped edges have been established in this paper.
基于层合柱壳混合状态方程和边界条件的弱形式,建立了两端固支层合闭口柱壳的温度应力混合方程,给出了任意厚度层合闭口柱壳在温度荷载和机械荷载共同作用下的解析解。
Quasi-Relativistic Density Functional Study of Strong Closed-Shell Interaction;
密度泛函理论在闭壳层相互作用中的应用
All the alkali metals have a single s-electron outside a closed shell.
所有的碱金属都在闭合壳层之外有一单个S电子。
Insert the lancet (Figure 2) and cut ? , the adductor muscle/s, according to the bivalve.
插入解剖刀(图二),沿著外壳切断闭壳肌.
A closed, spherical ascocarp.
闭囊壳一种关闭的球形子囊孢果
Enclosed in an oval, horny case.Used of an insect pupa.
壳内的封闭在椭圆形角质壳内的。用于一虫蛹
Every crustacean has a layer of shell, which is also called the carapace.
甲壳动物体外都有一层几丁质外壳, 称为甲壳。
(of an insect pupa) enclosed in a rigid case.
（用于虫蛹）封闭在硬壳内的。
A Property of An Enclosed Metall Shell in Electrostatic balance;
静电平衡下闭合导体壳的性质及应用
A B-rep Model Decomposition Approach Based on Face Shell Shrinking
基于面壳封闭的B-rep模型分解方法
A protective covering of bony plates or scales.
护身甲壳保护骨盘或介壳的覆盖层
The outer metal shell or case of a bullet.
弹壳子弹的金属外壳或金属外层
The clock has several @protective shells.
这种闹钟有好几层“护壳”。
bathydermal deformation
硅铝层深部地壳形变
having husk or outer brown layers removed.
去除了外壳或褐色外层。
The earth's crust is layered .
地球的外壳是分层的。
landing door closed detection device
层站门关闭监察装置
commercial trap
有商业价值的储层圈闭
The top surface in an enclosed space of a ship.
顶板密闭的船舱的顶层