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- Keywords Be_2（BO_3）F（BBF）;solid state synthesis;XRD;DTA;nonlinear optical material;powder frequency doubling;frequency boubling coefficient;birefractive index; 氟硼酸铍;固相合成;XRD;DTA;非线性光学材料;粉末倍频;倍频系数;双折射率;
- frequency boubling coefficient 倍频系数
- He varied the transmission frequency. 他变换了无线电传送的频率。
- A unit of frequency equal to one cycle per second. 赫兹频率的单位，等于每秒一周
- Fatal accidents have decreased in frequency over recent years. 近年来死亡事故发生的频率已经下降。
- We can often correlate age with frequency of illness. 年龄的大小往往与发病率有关。
- Accidents on that highway are happening with increasing frequency. 那条高速公路上车祸发生得越来越频繁。
- He tuned his radio to the police frequency. 他把无线电调到警方的频率。
- He manipulated the frequency dial of the radio. 他开始调拨频率键盘。
- The pitch depends on the frequency. 音调的高低是由频率决定的。
- The resulting frequency varies by a few percent. 最终频率有少许变动。
- I am majored in audio frequency amplifier. 我主修音频放大器。
- Small dissipation factor at high frequency. 高的频率和小的损耗因素.
- Spread the palpitate frequency love till ending. 循着心跳的频率爱到永不分离。
- Wave speed equals frequency times wavelength. 波速等于频率乘以波长。
- As she moved up in frequency, her ascension began. 当她频率增加时，她的提升也就开始。
- Fast frequency hopping avoids interference. 快速跳频避免干扰。
- He wrote to both with tolerable frequency. 他和他们通信，相当频繁。
- A frequency of one million megahertz,10000?200Hz. 一百万兆赫(兹)频率，即10000?200赫(兹)。
- In allene, the frequency falls further to 1389 ?? 在丙二稀类中，该频率再度降至1389厘?啤?/uk>
