您要查找的是不是：
- The state or quality of being null. 无效无效的状况或性质
- I bought an amplifier yesterday. 我昨天买了一个扩音器。
- The act of making null and void. 废除使 ... 作废和无效
- null amplifier 指零放大器
- The contract was null and void because it was not signed. 这个合同无效，因为它尚未签字。
- The court ruled that the claim was null and void. 法庭裁决此项要求无效。
- The marriage was declared null and void. 婚姻已宣告无效了。
- A gradual change in the output of a circuit or amplifier. 逐渐改变电路或放大器输出功率的逐渐改变
- The null subset corresponds to the term 1. 空集则对应于常数项1。
- Output from the inverting oscillator amplifier. 内部反向振荡放大器的输出。
- A null reference pointer was passed to the stub. 向占位程序传送了空的索引指针。
- The agreement was declared null and void. 这个协议被宣布无效。
- I am majored in audio frequency amplifier. 我主修音频放大器。
- A promise obtained by force is legally null. 一个以武力获得的契约在法律上是无效的。
- The operator O is the null operator. 算符O是零算符。
- REPAIR THE OPEN AMPLIFIER GROUND CIRCUIT. 维修断路的扩大器接地电路。
- The amplifier exploded in a fountain of sparks. 放大器爆炸，喷射出火星。
- A null field descriptor is the descriptor that forms the blank division in export. 一个空白字段描述符是在输出中形成空格的描述符。
- WHAT IS AN INSTRUMENTATION AMPLIFIER? 什么是仪表放大器?
- WHERE IS AN INSTRUMENTATION AMPLIFIER USED? 仪表放大器的使用场合?
