The interior of the tube must be kept a hard vacuum to preserve the photo cathode . 显象管内部一定要保证高真空才能保护光电阴极。
My parents were great picture-takers, and our family photo album told me a lot . 我父母拍照拍得不错，我从家庭相簿里知道了好多东西。
Radl found hobs end on the map and examined it in conjunction with the photos . 拉德尔在地图上找到霍布斯岬后，就参考着照片研究起来。
Every photo interpreter should be familiar with basic principles of photogrammetry . 每个相片解译人员都应当熟悉摄影测量学的基本原理。
Integrating devices use the photo cell pulse output to determine total amount of turning . 积分装置利用光电池的脉冲输出来确定旋转的总量。
The dipole oscillator sum can be expressed in terms of the integrated photo absorption cross section . 偶极谐振子和可以用积分后的光子吸收截面来表示。
In contrast, we could sharpen up the details in a slightly blurred photo by emphasizing its high-frequency components . 反过来，我们也可以通过加强其高频分量的办法，来突出一张有些模糊的照片的细节。
The same procedure can be used to remove the graininess of highly enlarged photographs, which is of value e.g. in aerial photo reconnaissance . 同样的步骤可以用来去掉放大很多倍的照片上的颗粒特性，这在航空摄影侦察中是有价值的。
At the moment the scheme looked promising but alex had not the least doubt that organized crime would soon find a way to duplicate the photos . 眼下看来，这个办法似乎可以行得通，可是亚历克斯毫不怀疑，罪犯集团很快就会找到仿照照片的办法。
What about showing me your whole - family photo 你能把你的全家福照片拿给我看吗？
