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- 正时Lorentz变换群positive-time Lorentz group
- 正在in the process of (doing something or happening)
- 时hour
- Lorentz变换Lorentz transformation
- 关于变换群的可迁性On Transferable Properties of Transformation Group
- 正Chinese 1st month of year
- Clifford代数与Lorentz变换Clifford Algebra and Lorentz Transformation
- 常微分方程变换群理论transformation group theory in ordinary differential equation
- 正时right time
- Lorentz变换链（LTL）原理的证明PROOF OF THE LORENTZ TRANSFORMATION LINK(LTL)THEOREM
- 关于变换群的探究教学案例A Case of Explorative Finance Teaching on Transformation Group
- 新闻提要每到半小时正时作一次广播。The news headlines are broadcast on the half hour.
- 关于Maxwell方程在Lorentz变换下的不变性原理ON THE INVARIABILITY PRINCIPLE OF THE MAXWELL-EQUATIONS UNDER THE LORENTZ-TRANSFORMATION
- 正时皮带timing belt
- 群 G的一个 Cayley图 X =Cay( G,S)称为正规的 ,如果右乘变换群 R( G)在 Aut( X )中正规 .A Cayley graph X=Cay(G,S) of group G is said to be normal if R(G),the group of right multiplications,is normal in Aut(X).
- 安装正时链、曲轴链轮和凸轮轴链轮，使正时标记对齐。Install the timing chain, crankshaft sprocket and camshaft sprocket with the timing marks aligne
- 正时锤timing chain
- 正时环timing ring
- 正时链timing chain
- 正时图timing diagram
