至于定宇大哥，他在一家it公司担任高级经营管理层不久，就创办了自己的高科技IT公司和提供特许经营的机会。

As for Ding Yu, he worked his way up to a senior managerial level in an it company. Soon after, he founded his own high tech it company and offered it franchise opportunities.

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求出了双光子系统的所有的波函数，这些波函数所代表的态都有一定的角动量和宇称，并且有系统地分析了这些态中光子的偏振情况。

All the wave function of a two-photon system with definite angular momentum and parity are found out, the polarization states of photons systematically analyzed.

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