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词典释义:
point group
时间: 2023-06-05 21:16:36
英 [pɔɪnt ɡruːp]
美 [pɔɪnt ɡrup]

n. 点群

双语例句
  • Horizontally pushing lifting jack of direct shear tests are operated on rock mass shear strength test. - center point group analysis is used for treating shear test data.

    用平推法直剪试验进行岩体抗剪断强度试验,用-点群中心法处理直剪试验数据。

  • The eigenfunctions of some triangles with symmetric group, such as right angle isosceles, transform as one dimensional representation of this point group.

    几何上具有对称性的三角形,它的本征函数,也具有相应的对称性,即对称性群的一维表示。

  • The associated process related point group type.

    相关流程相关点组类型。

  • The design and expression of computer three dimensional animation for the molecular point group were studied.

    探讨了采用计算机三维动画和多媒体技术描述分子点群的表达方法.

  • The quantitative analysis of each monitoring point group tallied with the fact.

    该方法简便、适用、且分辨率较高.对各监测点群的定量描述符合实际状况.

  • The camera focuses on a gun recoiling, then pans out to search for the impact point. A white line of smoke arcs above the city and ploughs into a group of houses.

    迫击炮弹爆炸的声响回荡在萨拉热窝上方的山上,摄影机镜头聚焦在一门发射时后冲的炮上,然后镜头伸向炮弹击中的地方,一条弧形白线越过城市上空掉落进一片房屋之中。

  • My sister shared a very good point which is that cell group is just a place for giving Christians to learn more biblical knowledge and a time for gathering together.

    我记得第一次认识顺圆弟弟是在教会的双语聚会中,透过美琪姐妹我才知道顺圆是自闭症患者。

  • The trouble with such complaints, at least from a research point of view, is that the group of people complaining may not represent the owners as a whole.

    这些诉讼的问题在于,至少从研究的观点来看,它们不完全代表车主所遇到的问题。

  • Two outstanding late saves, followed by a glaring miss from the substitute Nolito, contributed greatly to an important point against arguably United's closest rivals in Group C.

    在阻止了替补出场的诺里托精彩的射门后,在接近比赛尾声时的两次精彩扑救为曼联无可争议的从C组最大竞争对手身上拿到了客场宝贵的一分。

  • A few years ago, sustainable growth, as a manner free of excessive or insufficient growth, had become a focal point because of the collapse of GIANT GROUP.

    当年巨人集团的失败曾一度引起人们对可持续增长这样一种超越增长不足和增长过度的理想增长方式的探讨。

百科

晶体中所含有的全部宏观对称元素至少交于一点,这些汇聚于一点的全部对称元素的各种组合称为晶体的点群(point group)。 点群一般用于晶体的数学分析中。当晶体具有一个以上的对称元素时,这些对称元素一定会通过一个公共点,相应的对称操作都属于点操作。

释义
n.

Crystallography any of the 32 sets of symmetry operations which can be used to characterize three-dimensional lattices and are the basis of the system of crystal classes

【晶体】 点群。

易错必背词
词源

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