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Two photons are created in the decay of the neutral pion. 双光子是在中性兀介子衰变中产生的。
"The axion is so light that it doesn't decay into two photons in free space. " “轴子很轻，它不会在自由空间中衰变成两个光子。
We think with the appropriate design of structure, anthracenederivatives can be used as fine two photon absorption materials. 我们认为经过恰当结构设计合成出的蒽基衍生物可能成为一类优良的双光子材料。
The one photon and two photon excited UV fluorescence spectra of 1, 10 phenanthroline and [bis(1, 10 phenanthroline)lanthanum] nitrate are observed in the methanol solution. 测量了1，10-二氮杂菲和硝酸[二-（1，10-二氮杂菲）合镧]甲醇溶液的单光子和双光子激发紫外荧光谱。
Both the red and green emissions of Er 3+ in oxyfluoride host are due to two photon process. The green emission in ZBLAN is due to two photon process, and the red emission is due to two and three photon processes. 分析了两种基质中Er3+ 的上转换发光机制 ,氟氧化物基质中Er3+ 离子红绿光发射均为双光子过程 ,ZBLAN基质中Er3+ 离子绿光发射为双光子过程 ,而红光发射为双光子和三光子混合过程。
The two photons go off together as coherent radiation. 这两个光子一起发射出去，形成相干辐射。
The efficiency of the non resonant two photon (NRTP) isomerizations of stilbenes and 1,4 diphenyl 1,3 butadienes was found to depend strongly on the wavelength of the laser pulses. 实验发现,芪,1,4-二苯基1,3-丁二烯等多聚烯化合物的非共振双光子(NRTP)异构化强烈地依赖于光波长。
Whether to match through checking the certain quanta character of two photon, two receive a station to be able to be maintained whether somebody tries intercept their communication signal. 通过检查两个光子的某些量子特性是否匹配，两个接收站就能认定是否有人试图截取他们的通讯信号。
two photon absorption cross section 双光子吸收截面
doppler free two photon spectroscopy 多普勒自由双光子光谱学
two photon Jaynes-Cummings model 双光子Jaynes-Cummings模型
two photon micro stereo lithography 双光子微细光成形
The two systems of government are polar opposites. 这两种政体正好相反。
Non-degenerate two photon process 非简并双光子过程
The business is owned by two partners. 这家商行为两名合伙人所拥有。
These two photons in turn could stimulate two other atoms to emit photons, yielding four photons. 这两个光子接著会激发另两个原子放出光子而产生四个光子。
The interference of two photons is essentially due to the indistinguishability of the two-photon states. 双光子干涉本质是整体状态不可区分。
She has two cars and in addition a motorboat. 她有两辆轿车外加一艘汽艇。
The meat marinated in the brine for two days. 这块肉在盐水里泡了两天。
Two photons are created in the decay of the neutral pion 双光子是在中性兀介子衰变中产生的。