You need to pin down an object of study, a first principle from which other principles can emerge, and part of the process is to say, "Hey, it's not literature we're talking about."
首要原则是，需要锁定要谈论，即学习的目标，可是，谁知道什么是文学。
The Politeness Principle is a key part in pragmatics, and it may give great direction to the study of euphemism.
礼貌原则是语用学的一个重要内容，对英语委婉语的研究有很重要的指导意义。
In the third part, using the principle of coherence, we study the properties of the beam array with radial or azimuthal polarized propagating in the free space.
第三章利用了相干叠加原理，理论上对具有角向及径向分布的偏振态的光束列阵在自由空间的传输性质进行了研究。
In the third part, using the principle of coherence, we study the properties of the beam array with radial or azimuthal polarized propagating in the free space.
第三章利用了相干叠加原理，理论上对具有角向及径向分布的偏振态的光束列阵在自由空间的传输性质进行了研究。
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