vt.

1. 發現，察覺；查出，看穿
   I detected anger in her voice.

   我察覺出她說話聲裡含著憤怒。

   He soon detected the faulty valve.

   他很快查到了出毛病的閥門。

2. 【無】對……檢波

v.

1. discover or identify the presence or existence of.
2. discover or investigate (a crime or its perpetrators).
3. discern (something intangible or barely perceptible).