In this paper, we discussed the transition selection rule of electrical dipole radiation in atom physics by the parity theory and angular momentum theory in quantum.

本文利用量子力学的宇称理论和角动量理论，对原子物理学中所熟知的电偶极辐射的跃迁选择定则进行了理论探讨。

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However, the selection criteria of the transition point needs to be further studied and optimized.

然而，转变点的标准的选取和优化还要进一步的研究。

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The theoretical calculation value of some common transition fit is compared with practical statistical value, which is of practically reference to the accuracy selection in mechanical design.

并对几种常用过渡配合的理论计算值及实际统计值作比较，这对于机械设计中的精度选择有实际参考意义。

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They called for all Catholic trustees to endorse a phased transition away from the use of academic selection and for all boards of governors of Catholic Schools to engage with each other during the coming academic year to discuss how to move to "high quality non-selective arrangements within their area".

BBC: Catholic bishops in call over academic selection

But instead, that the typical advisor client relationship transition from a state of dependence to one of interdependence where people are more involved in the investment management selection and monitoring process.

FORBES: Fiduciary Standard Sends The Wrong Message