contact continuity

例句：

1. 1.They contacted the police about the suspicious incident.
   他们联系了警方关于这个可疑事件。
2. 2.The two countries have maintained close contact through various channels.
   这两个国家通过各种渠道保持密切联系。
3. 3. She contacted her friend to let them know about the new project.
   她联系了她的朋友，让他们知道这个项目。