The marriage was declared null and void. 婚姻已宣告无效了。
An agreement signed by a child is void. 由儿童签署的协议是无效的。
We will void the existing and issue a new one. 我们将把现有的作废，然后再出一张新的。
There notes we designed during World War II to be easily declared void if captured in large numbers by the enemy. 这些钞票是在二次大战中设计的，为的是如果被敌方大量缴获，就可能轻而易举地宣布作废。
