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- The state or quality of being null. 无效无效的状况或性质
- The act of making null and void. 废除使 ... 作废和无效
- There are two breakers in this circuit. 这个电路里面使用了两个断路器。
- A replaceable printed circuit board. 一种可替换的印制电路板。
- The circuit of the city walls is three miles. 环绕本市城墙的周长是三英里。
- The contract was null and void because it was not signed. 这个合同无效，因为它尚未签字。
- There must be a break in the circuit. 电路中一定有断路。
- The court ruled that the claim was null and void. 法庭裁决此项要求无效。
- A short circuit will blow the fuse. 短路会烧断保险丝的。
- A short circuit put the machine out of action. 短路使机器停转。
- The switches close the contacts and complete the circuit. 这些开关可使接触器接通电流形成回路。
- The marriage was declared null and void. 婚姻已宣告无效了。
- The null subset corresponds to the term 1. 空集则对应于常数项1。
- 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。
- Don't connect up the two wires, or there will be a short circuit. 不要把这两条电线接在一起，否则会短路的。
- The rocket did one circuit of the earth and returned to base. 火箭绕地球运行一周后返回基地。
- 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。
- The earth takes a year to make a circuit of (ie go round) the sun. 地球绕太阳一周需要一年时间。
