selective jammer

例句：

1. 1.The selective jammer effectively blocks all incoming signals.
   选择性干扰器有效地阻挡了所有传入的信号。
2. 2.In order to improve network security, the company developed a selective jammer.
   为了提高网络安全，该公司开发了一种选择性干扰器。
3. 3.The selective jammer was used to prevent unauthorized access to sensitive data.
   选择性干扰器被用来防止未经授权访问敏感数据。