英语词汇focal distance怎么读，是什么意思，单词翻译、读音、固定搭配用法和短语词组及例句-英汉双解词典

双语例句

1
Crater depth versus pulse power density, average laser power, pulse repetition frequency and focal distances are built up through experiment.
试验建立起了凹坑深度与脉冲功率密度、激光平均功率、脉冲重复频率和离焦量之间的关系曲线。
2
It is proved that a small circular aperture has the positive and minus focal distances, and the research experiments for small aperture glasses are introduced concisely.
提出了证明小圆孔具有正、负焦距的一种方法，简要地介绍了关于小孔眼镜的实验研究。
3
The conclusion shows that reasonable selections of the focal distances of the main reflector may be able to obtain low RCS, keeping the high-gain under the antenna unchanged.
结果表明，在保持增益不变的情况下合理选择主反射面的焦距是能够达到降低雷达散射截面的需要的。

单词	focal distance
释义	focal distance 简明释义焦距：光学中指从透镜或反射镜的光学中心到其所成的像或反射点的距离。网络释义短语 1 multi-focal distances 多焦距 2 principal focal distances 主焦距 3 conjugate focal distances 共轭焦距双语例句 1 Crater depth versus pulse power density, average laser power, pulse repetition frequency and focal distances are built up through experiment. 试验建立起了凹坑深度与脉冲功率密度、激光平均功率、脉冲重复频率和离焦量之间的关系曲线。 2 It is proved that a small circular aperture has the positive and minus focal distances, and the research experiments for small aperture glasses are introduced concisely. 提出了证明小圆孔具有正、负焦距的一种方法，简要地介绍了关于小孔眼镜的实验研究。 3 The conclusion shows that reasonable selections of the focal distances of the main reflector may be able to obtain low RCS, keeping the high-gain under the antenna unchanged. 结果表明，在保持增益不变的情况下合理选择主反射面的焦距是能够达到降低雷达散射截面的需要的。
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