四极，汉语词语，读音sì jí，意思是四方极远之地；指四方极远之国；古代神话传说中四方的擎天柱；四境；指四肢。
n. quadrupole
... four pole equivalent network 四端网络等效电路 four pole 四极 four wire line 四线线路 ...
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... quadrupole momentum四极矩 quadrupole quadrupole force四极 四极力 quadrupole radiation四极辐射 ...
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四极管 [电子] tetrode ; quadrode ; quadratron ; quadrupole
四极透镜 [电子] quadrupole lens ; quadrupole
四极矩 [电磁] quadrupole moment ; moment quadrupole
电四极矩 [电] electric quadrupole moment ; electric quadrupole ; moment electric quadrupole
核四极共振 [核] nuclear quadrupole resonance ; NQR
四极场 [电磁] quadrupole field
四极滤质器 quadrupole mass filter
静电四极透镜 [电子] [光] electrostatic quadrupole lens
晶体四极管 [电子] crystal tetrode ; [电子] tetrode transistor
Directional emission of light guided by quadrupolar-shaped quantum cascademicrocavity lasers solves the difficulty about the directional emission ofsymmetrical microcavity lasers. In this thesis, quadrupolar-shaped quantum cascademicrocavity lasrs and several related lasers are introduced in brief.
四极子量子级联微腔激光器带来的光的方向性激射，解决了对称型微腔激光器光的方向性激射的困难。
参考来源 - 四极子量子级联微腔激光器理论研究和工艺制作·2,447,543篇论文数据，部分数据来源于NoteExpress
用四极质量分析仪对碳化硅颗粒表面吸收的气体进行了分析，获得了碳化硅颗粒的表面化学成分。
The gases absorbed on the surface of SiC particles are analyzed with the quadripole mass analyzer.
偶极，四极。方位角对称。静磁，带电量守恒及磁力。
Dipoles, Quadrupoles. Azimuthal Symmetry. Magnetostatics, Charge Conservation and Magnetic Force.
结束电偶极辐射之讨论。定性解释电四极特性及磁偶极辐射。
Finish Electric Dipole Radiation. Qualitative Aspects of Electric Quadrupole and Magnetic Dipole Radiation.
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