您要查找的是不是：
- three dB bandwidth 三分贝带宽
- Both theoretical and experimental results show that the packaged photodiodes can have a 3 dB bandwidth which is broader than that of the photodiode chip. 理论分析和实验结果都证明优化封装后器件的频率响应带宽超过了芯片的响应带宽。
- A measurement of the difference in cycles/sec between the limiting frequencies of a band in which the attenuation of any frequency, with respect to the central frequency, isless than a specified value(usually half power or three db). 一个频带的上下界频率之间差的一种度量，以周期/秒表示。在该频带中，任何一频率的衰减（对中心频率而言）小于一个特定的值（通常为半功率或3分贝）。
- He trudge three hour in the snow to get back home. 他在雪中跋涉三个钟点才回到家。
- Our family reunions are always three ring circus. 我家合家团聚的场面总是热闹非凡。
- --3 dB bandwidth -3dB带宽
- The train arrived on the dot of three o'clock. 那辆火车三点钟准时到达。
- Her family lives three li away from her school. 她家住在离学校有三里路的地方。
- We spied three figures in the distance. 我们望见远处有三个人影儿。
- The earthwork was cast up in three hours. 土方工程在三小时内就完成了。
- It's three blocks straight ahead. 一直往前走过三个街区就是。
- The investigator will be divided into three groups. 所有的调查员将被分为三个小组。
- Three people can sit in the back of this car. 这车的后座可坐3个人。
- I did the calculation by the rule of three. 我是根据比例运算法则计算出来的。
- He is on night duty three days a week. 他一个星期要上三天夜班。
- He knocked back three pints of beer in ten minutes. 他在10分钟里喝了3品脱啤酒。
- It's three years to the day since we met. 我们整整三年没见面了。
- I will make you learn driving in three days. 我将使你在三天之内学会开车。
- The car is three years old and still unpaid for. 这汽车用了三年还没付购车款呢。
- The cipher took me three weeks before I hit it. 我费了3个多星期才把这密码解释出来。
