把狄拉克方程分解成了两个单旋量的联立方程组。
The Dirac equation is decomposed into a pair of equations of two spinors.
针对常规单旋翼带尾桨直升机，讨论不同特性的入流模型在直升机数值仿真中的作用。
For the classical helicopter of single main rotor with tail rotor, the effect of inflow models with different characteristics on helicopter trim and digital simulation were discussed in this paper.
萤火虫项目是一种单旋翼直升机，使用美国混合动力(US Hybrid)公司制造的电池。
It's a single rotor helicopter powered by batteries made by US Hybrid.
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