势能

For example, before you can throw a ball you must first swing your arm backwards.

比如说在你投掷一个球之前必然要先向后弯曲你的手臂获得足够的势能。

The potential energy contours describe the structure character of PdPb2 ground state molecule rightly. Furthermore, molecular static reaction pathway based on this potential energy function is investigated.

使用多体展式理论导出了势函数中的参数进而给出PdPb2分子基态势函数的解析表达式，其势能面准确地复现了PdPb2分子的两个稳定构型( C 2 V 和 C ∞ v )及其能量关系。

Based on the higher-order Cauchy-Born constitutive model, a seriers of infinitesimal mechanical properties and the strain energy for the graphite sheet and SWCNT are studied firstly with the consideration of the influences from tube chirality and radius, potential parameters and the inner displacement.

基于所发展的高阶Cauchy-Born广义连续体本构模型，首先对石墨片和单壁碳纳米管的一系列无限小变形的力学特性(如：轴向和环向模量、泊松比、剪切模量)以及应变能进行了研究，同时也考察了手性、半径、势能参数以及内位移放松等因素对这些力学特性的影响。

As streams of material spiral from the disk onto the star, its mass increases and it brightens and heats up dramatically. The resulting outburst causes temperatures to rise in the star's surrounding disk.

随着物质流从行星盘落向中央恒星，恒星的质量增加并剧烈的变热（重力势能转化为热能——译注），结果产生的爆发导致周围的行星盘变热。

This paper systematically describes the view on the use electrostatic energy, electrostatic self-energy, interaction energy, electric potential and electrostatic field can be the difference and connection, to clarify some vague ideas, help on the electrostatic field can deep understanding.

摘 要：本文系统地用场论的观点说明了静电能、静电自能、相互作用能、电势能和静电场能的区别与联系，澄清了某些含混不清的观念，有助于对静电场能的深刻领会。

Type shown above, the lower temperature as allyl methyl carbocations (1) is greater than the stability of carbocations (2), so the potential energy diagram in the reaction pathway for the carbon embodied in the positive ion hybrid resonance body and Chloride Cl-if by 1,4 - addition will have to experience higher ...

如上式所示，较低温度下由于烯丙基甲基碳正离子(1)的稳定性大于碳正离子(2)，所以在反应历程势能图中体现为碳正离子共振杂化体与氯离子Cl-若按1，4-加成则要经历较高。。。

ZINDO, a semi-empirical method of quantum chemistry implemented in programs Cerius2, was used to calculate and analyze the static conformation of models, formal charge of atoms, the bond length, HOMO and LUMO after running a preliminary minimization and other electronic properties also were studied.

用分子力场和分子动力学模拟方法得出最优构型太原理工大学硕士研究生学位论文及在此构型下的势能、键合作用和非键合作用能等能量参数，并进行了对比，发现在煤的大分子结构中起主要作用的是非键合作用的范德华和氢键作用能。

Energy stored in objects could be in chemical or potential form.

储存於物件里的能量形式可以是化学能或势能。

A broad sense of the solar energy on earth many sources, such as wind energy, chemical energy, potential energy of water and so on.

广义上的太阳能是地球上许多能量的来源，如风能，化学能，水的势能等等。

Density functional theory calculations at the B3LYP/6-31G level of theory were employed to study the mechanism and the potential energy surface of Diels-Alder reactions between Lewis base stabilized borabenzene and dienophiles.

采用密度泛函理论方法在B3LYP/6-31G水平上研究了Lewis碱稳定的硼代苯与一些亲二烯体的两种可能的Diels-Alder反应的微观机理和势能剖面，并研究了反应的溶剂效应和取代基效应。

Cynanchum Lingtai apricot production in the average weight 65 grams, the brightly-colored fruit, juicy rich, sweet-sour taste, sweet from the nucleolus, when the late Qing Dynasty famous Shaanxi, Gansu provinces, the Qing imperial court Tongzhi tribute for years.

灵台生产的牛心杏平均单果重65克，果实色泽鲜艳，汁多味浓，甜酸适口，离核仁甜，清末时就驰名陕、甘两省，清同治年间曾为朝廷贡品。

Chenopodium album,Solanum nigrum, and Amaranthus retroflexus were very susceptible to the herbicides. Polygonum persicaria and Abutilon theophrasti were relatively less susceptible to the herbicides, and Lycopersicon esculentum was not susceptible to it. The relationship between reduction rates of weed biomass and PPM values of weed leaves 2,4, and 6 days after treatment was established.

供试的6种杂草对该混剂的敏感性存在显著差异：红心藜Chenopodium album、龙葵Solanum nigrum和反枝苋Amaranthus retroflexus对该混剂最敏感，ED90值分别为47.65、71.67和29.17g/hm2；春蓼Polygonum persicaria和苘麻Abutilon theophrasti敏感，ED90值分别为96.91、114.20g/hm2；而番茄不敏感。