aperture

• The only light came through a narrow aperture .
  仅有的光亮来自一个小孔。
• The first aperture was sufficiently large to enter .
  最初出现的洞口已可容纳一个人进去。
• Being cautious, he had made the aperture too small .
  由于小心谨慎，他刚才把洞开得太小了。
• We must not forget to open the aperture at the second contact .
  在食既时不要忘记放大光圈。
• The quadratic aperture of the cat's-eye diaphragm is imaged too large .
  猫眼光栏的方形光孔成象太大。
• If the aperture is circular, a circular spot of light appears on the screen .
  如果孔是圆形的，那么在屏幕上出现一圆形光斑。
• These ions pass through a slit of variable aperture and then enter the magnetic field analyzer .
  这些离子通过可变宽度的狭缝进入磁场分析器。
• The aperture allows the desired beam to enter the camera while all other light is intercepted .
  孔可以使所需要的光束进入照相机，而将其余的光线遮挡住。
• Figure 6-9 shows the oven with the small aperture for viewing the radiation leaving the enclosure .
  图6-9表示一个空腔，上面开着一个小孔，用来观察空腔发出的辐射。
• Now remove a small disk-shaped segment from the center of the screen so that light streams through the aperture .
  现在从屏的中央挖掉一个圆盘形小块，使光通过此孔射出。