所有科技知识-科学参考

科学参考收录了1248194条科技类词条，基本涵盖了常见科技类参考文献及英语词汇的翻译，是科学学习和研究的有利工具。

principal period	principal phase	principal picture components	principal piece	principal plane
principal plane of bending	principal plane of inertia	principal plane of stress	principal plane pattern	principal planet
principal point	principal point radial line plotting	principal polarization plane	principal portion	principal post
principal pressure	principal problem	principal product	principal projection property	principal proposition
principal purlin	principal quantum number	principal radius of curvature	principal rafter	principal raw material
principal ray	principal reactance	principal reaction	principal reflection	principal refraction index
principal representation	principal river	principal road	principal root	principal rotating motion
principal route	principal saddle	principal search direction	principal section	principal sector
principal series	principal series line	principal shareholder	principal sheet	principal solution
principal space	principal species	principal spectrum	principal square root	principal square submatrix
principal stages of development of the embryo	principal star	principal station	principal stimulated seismic activity	principal straight motion
principal strain	principal strain directions	principal stress	principal stress axis	principal stress plane
principal stress ratio	principal stress space	principal stress trajectory	principal subspace	principal sulcus
principal sum	principal supply road	principal surface of accumulation	principal synoptic station	principal tangent
principal tapping	principal telescope	principal tensile stress	principal tensor	principal term
principal terminal	principal test section	principal tetrahedron	principal trace	principal trade partners
principal traffic route (P.T.R.)	principal transversal	principal triangle	principal trihedral	principal trunk
principal unit assembling	principal valence	principal valency	principal value	principal value of stress tensor
principal valve	principal variable	principal vector	principal velocity	principal vertical
principal vertical circle	principal vertical circle (observer's meridian)	principal vertical deflection	principal vertical line (照片)	principal vestibular nucleus
principal view	principal virgin stress	principal voltage	principal wave	principal weld
principal windings	principal wire bundle	principal yield	principle	principle addition canonical expansion theorem
Principle and Prohibition for Medical profession	principle audit	principle layout	principle of absolute advantage	principle of abstraction
principle of action and reaction	principle of all inclusiveness	principle of anti-fraud	principle of argument	principle of causa proxima
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