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汉语拼音：jiāo bǐ

1.炼铁时，所消耗的焦炭量跟炼出的生铁量的比。一般用平均每吨合格生铁所消耗的干焦量(吨)表示。

1. 炼铁时，所消耗的焦炭量跟炼出的生铁量的比。一般用平均每吨合格生铁所消耗的干焦量(吨)表示。

• The baker Super - Schmidt camera can operate with extremely low focal ratios.

  Baker超施密特照相机则能以非常低的焦比工作.

• Telephoto - type SLR cameras have a similar appearance, and more portable than the fuselage and zoom features.

  长焦型相机有着近似单反相机的外型, 更加便携的机身和大变焦比的特性.

• The running - condition of BF had been improved with the coke - rate decreasing and the conductivity raising.

  高炉顺行状况得到改善,焦比降低,产量提高.

• Global zoom ratio ( by percentage ) and range of font size to apply zooming to.

  全球变焦比率 ( 百分比 ) 和字体大小缩放范围的申请.

• A refracting reflecting flat CCD camera with quick F ratio and wide field is introduced.

  介绍了折反式大视场强焦比平场CCD照相机的设计思想和方法,给出了详细的结构参数和像斑弥散直径.

• The earliest attempts at minimizing this problem involved making instruments with very long focal ratios.

  最早采用的减小色差的方法是尽可能制造长焦比的望远镜.