| 词汇 | dipole |
| 释义 | dipole noun[ C ] uk /ˈdaɪ.pəʊl/ us /ˈdaɪ.poʊl/ dipolenoun[C] (IN SCIENCE)physics specialized two poles that have opposite and equal electrical charge or magnetic force, with a space between them: 偶极子 Geomagnetic South Pole represents the axis of the Earth's magnetic dipole. 地磁南极代表地球磁偶极子的轴。 chemistry specialized a molecule with an area of negative charge and an area of positive charge that are separated: 偶极子 Many molecules (such as those of water) are electric dipoles, meaning that they have a partial positive charge at one end and a partial negative charge at the other.许多分子（例如水分子）都是电偶极子，也就是说分子的一端含部分正电荷，另一端含部分负电荷。 By Maxwell's time, it was clear that the electromagnetic field was the means by which electrical charges and magnetic dipoles act on each other at a distance. If the dipolarity of the generator in the power system is lost, mechanical energy has to be fed into the shaft of the generators to restore the dipole. The centre of positive charge does not coincide with the centre of negative charge; we say that the bond is polar or that it has a dipole. The bent molecule H2O has a dipole, but the linear CO2 (O=C=O) does not. Physics: energy, force & power animal magnetism anti-gravity atmospheric pressure attract attraction ballistic entropically equilibrant erg excited frictional geothermal inertia propulsive radiant energy self-propulsion sine curve sinusoid the sound barrier thermodynamics You can also find related words, phrases, and synonyms in the topics: Physics: atoms, molecules & sub-atomic particles dipolenoun[C] (FOR RADIO)(alsodipole antenna) a simple type of radio aerial(= a structure that receives or sends out radio signals) that is shaped like the letter T: 偶极子天线 With most FM radio stations today, a vertical dipole gives as much signal as a horizontal one.对如今大多数的调频广播电台来说，垂直偶极子天线和水平偶极子天线发出的信号的强度是一样的。 ubonwanu/iStock/Getty Images Plus/GettyImages The world's first radio astronomer, he presided over a field of dipoles (antennas) 3,500 feet in diameter while continuing his private research. I use a 440mHz transmitter radio with a 6.5" horizontal dipole antenna. Broadcasting: radio am antenna anti-jamming anti-radar autotune bandwidth beacon CB medium wave multi-wavelength multichannel MW omnidirectional receiver short wave shout-out tranny transponder tuner two-way Examples of dipoledipole The transverse electrostatic field in the pore resulted in a high degree of alignment of the water dipoles. A dipole-like model of the geomagnetic field was used. These coordinates provide a standardized coordinate system for the dipoles across the participants. We substitute (4.8) and (4.9) into (2.14) and (2.18) for the force dipole. In systems with substantial compressibility, however, such as a levitated dipole, all low-frequency modes can be stable. The trajectories of two group of dipoles located every half wavelength apart in the vertical are nonetheless clearly visible. In the case of an axially symmetric vortex, the newly formed dipoles diverge in arbitrary directions, whereas here it is predetermined by the initial configuration. Note that the effect of any non-zero streaming is to introduce a dipole into the electric field, far from the grain. The study indicates that the intensity-dependent phase of the atomic dipole should play a major role in the spatial coherence proper ties of harmonic emission. Furthermore, intra-pore waters oriented themselves with their dipoles anti-parallel to the helix dipoles, as did the hydroxyl groups of serine residues. To this end, rotational constants, dipole moments and infrared frequencies were calculated. It can be conjectured that in this case the electric field is too weak to prevent breakthrough caused by the hydrodynamic dipole. We suppose that this can be connected with the possibility for the dipole vortex to trap free drift waves. In this article we present the first observations of lowfrequency quasi-coherent modes in a dipole and the conditions under which these modes are seen. This constrained the locations of the dipoles to a realistic topography based on individual participant data. These examples are from corpora and from sources on the web. Any opinions in the examples do not represent the opinion of the Cambridge Dictionary editors or of Cambridge University Press or its licensors. |
| 随便看 |
|
反思网英语在线翻译词典收录了377474条英语词汇在线翻译词条，基本涵盖了全部常用英语词汇的中英文双语翻译及用法，是英语学习的有利工具。