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For most of tertiary phosphine ligands, the coupling yields of bromobenzene can reach to about 90%.

对大多数的叔膦配体，溴苯的偶合产物的产率均可达到约90％。

If under ideal conditions, one electron-hole pair injected yields one blue photon and the quantum efficiency of the phosphor equals one, the numbers of electron-hole pair must equal to the numbers of white photons. So LW white LED radiation power output has to consume 1.51 W electric powers and the luminous flux efficiency limitation of electrical to optical conversion for the white LED is 197.8lm/W at above condition.

在理想情况下，注入一个电子－孔穴对产生一个蓝光光子，设荧光粉的量子效率为1，因此，注入的电子－孔穴对数亦等于白光光子数，进而计算出白光LED每辐射1W的光功率所需的电功率为1.51W，上述白光LED发光光谱对应的白光LED的电－光转换的理论极限流明效率为197.8lm/W。

The result showed that the luminous flux for LW white LED radiation power output is 298.7 lm and the total photons are 2.7×1018. If under ideal conditions, one electron-hole pair injected yields one blue photon and the quantum efficiency of the phosphor equals one, the numbers of electron-hole pair must equal to the numbers of white photons.

在理想情况下，注入一个电子-孔穴对产生一个蓝光光子，设荧光粉的量子效率为1，因此，注入的电子-孔穴对数亦等于白光光子数，进而计算出白光LED每辐射1 W的光功率所需的电功率为1.51 W，上述白光LED发光光谱对应的白光LED的电-光转换的理论极限流明效率为197.8 lm/W。

Quantum yields for photoinitiation and photodecomposition are also low with Mn.

采用Mn时，光引发和光分解的量子产率也很低。

EGS4, a Monte Carlo code, was used to simulate the transportation of electron photon clusters in the targets and the photon track lengthes were calculated by tracking the radiation photons to determine the photoneutron yields .

计算了电子加速器中不同能量的电子垂直入射到钨靶和金靶上时的光中子产额。

The quantum yields of ACRM with photosensitizer is improved by 2-4 times.

光敏剂的加入使酸敏变色材料量子产率提高了2-4倍。

Objective: To study the fluorescence spectra of tetraphenylporphyrine and its fluorescence quantum yields, so as to search for better photosensitizer.

目的：将四苯基卟啉(H2TPP)及其衍生物作为研究对象，测定其荧光光谱和荧光量子产率，从而筛选出较好的光敏剂。

These trees are widely cultivated for ornament and shade and for their timber and resinous sap, which yields turpentine and pine tar.

这种树作为装饰、乘凉、木材和产生松油和松焦油的树脂而广泛种植

The quality of cis-pinane synthesized from α-pinene by catalytic hydrogenation effects its post-products' yields and qualities.

以蒎烯为原料合成各种萜烯香料受到国内外香料界的普通重视，α-蒎烯催化氢化合成的顺式蒎烷的品位直接影响到后续产品的收率和质量。

This optimal allocation yields the highest level of utility (at point C , the tangency of the capital allocation line and the highest indifference curve).

该最优配置使得投资者效用最大化（在 CAL 线和无差异曲线的相切处 C 点达到）。

It's bell can reach over a meter in diameter.

它的身体最大可以达到直径1米多。

Now they are overdue and I shall have to pay a fine.

现在他们过期了，我不得不付罚款。