侦听，侦查，监测to monitor

• 美国侦测到苏联在8月24日又进行了一次地下核爆炸。

  The United States detected that the Soviet Union carried out another underground nuclear explosion on August 24.

• 海军则主要负责航道、船只和水下安全的侦测。

  The Navy is primarily responsible for monitoring waterway, shipping, and underwater security.