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- The quantitative relation model was established between the fundamental or sum frequency and properties of straight chain alkanes. 在此基础上建立了直链烷烃的物化性能与基频和总频之间的定量相关模型.
- According to Sellmeier's equations for BBO crystal,the relationship of phase matching angle of generating the sum frequency effect to wavelength is theoreti-cally calculated. 根据BBo晶体Sellmeier方程确定的折射率，计算了在钛宝石激光可调谐波段的和频相位匹配角。
- A novel all-optical wavelength conversion (AOWC) based on the cascaded sum frequency generation (SFG) and difference frequency generation (DFG) in LiNbO?3 waveguides have been theoretically studied. 对基于级联和频差频非线性效应铌酸锂光波导新型全光波长转换器进行了理论研究。
- The UV pump radiation was obtained through a sum frequency process of the fundamental and the second harmonic of a CW mode locked Nd: YLF laser, where a novel wald off compensation scheme was adopted. 紫外泵浦光由连续波锁模Nd:YLF激光器输出的1053nm基频光与5265nm二倍频光经和频过程得到,和频过程采用了走离补偿新方案。
- Recently, SFG (sum frequency generation vibrational spectroscopy) has been developed into a powerful technique to probe in-situ surface composition and orientation information at submolecular level. 近年来发展起来的和频振动光谱(SFG)能在准单分子层水平上原位研究聚合物表面的基团及其取向等信息，被认为是表征聚合物界面结构的最佳技术手段之一。
- A novel all-optical wavelength conversion (AOWC) based on the cascaded sum frequency generation (SFG) and difference frequency generation (DFG) in LiNbO3 waveguides have been theoretically studied. 对基于级联和频差频非线性效应铌酸锂光波导新型全光波长转换器进行了理论研究。
- I had to spend a large sum of money to get it back. 我得花一大笔钱才把它弄回来。
- They clubbed together a large sum. 他们集资到一大笔款子。
- Please sum up what you said just now. 请把你刚才说的总结一下。
- The clerks figures up the sum on a computer. 办事员用计算机算出总教。
- Ten years was the sum total of my education. 我受教育的年限加起来共十年。
- The company set this sum by for future use. 公司把这笔款留作将来之用。
- His brother made out the sum to settle the account. 他兄弟拼凑了这笔款子来了结账目。
- They paid me the princely sum of USD5000. 他们慷慨地给我5000美元。
- His debts foot up to a huge sum. 他欠的债加起来是一笔巨款。
- Now sum up (your views) in a few words. 现在(把你的观点)用几句话来概括一下。
- He got paid a piffling sum after weeks of work. 他工作数周所得甚微。
- He deposits a sum of money in the bank each month. 他每月在银行存一笔钱。
- In sum, theory must be combined with practice. 总之，理论必须同实践相结合。
- My father paid out me large sum for my education. 我父亲为我读书花去了一大笔钱。
