We see that before 1650 it took nearly 35, 000 years, or about 1, 400 generations, for the world population to double . 我们可以看到,在1650年以前,世界人口的倍增,要经历将近35万年或近1400代人的时间。
In electronic detectors such as photomultipliers and television tubes, noise manifests itself as random fluctuations in the output current . 对于光电倍增管,电视摄像管之类的电子探测器,噪声则表现为输出电流的随机起伏。
Figure 6. 20 illustrates a commercially available fringe multiplication and fringe sharpening apparatus mounted on a polariscope specially designed to facilitate these applications . 图6.20所示为一台市售的条纹倍增和细化装置,它安装在一台便于使用的专门设计的偏振光弹仪上。
Hobbies will be good for your emotional well being 业余爱好也让你的幸福感倍增。
We have multiplied out possessions , but reduced out values 我们拥有的财富倍增