他乞求老师在讲课时语速再快上一倍，那就能提前一半的时间下课。
He begs his teacher to talk twice as quickly so that class will be over in half the time.
把数据率减少一半，就能使每一符号间隔的持续时间延长一倍。
Reducing the data rate by one-half will double the duration of each symbol interval.
在给定带宽条件下，将数据传输速度减慢一半，就能使每一个符号间隔的持续时间延长一倍。
Transmitting the data half as fast for given bandwidth will double the duration of each symbol interval.
就和f值一样，这一组数字也是一个数列关系，每一档快门速度都是比上一档快一倍的时间，或者是慢一半的时间。
Just like with f-stops, there is a mathematical relationship between different shutter speeds-each shutter speed stays open half as long as the one above it, or twice as long the one below it.
就和f值一样，这一组数字也是一个数列关系，每一档快门速度都是比上一档快一倍的时间，或者是慢一半的时间。
Just like with f-stops, there is a mathematical relationship between different shutter speeds-each shutter speed stays open half as long as the one above it, or twice as long the one below it.
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