gold detector

例句：

1. 1. This gold detector can detect gold in a matter of seconds.
   这个金探测器可以在几秒钟内检测出黄金。
2. 2. The gold detector was used to detect the hidden treasure.
   金探测器被用来探测隐藏的宝藏。
3. 3.The gold detector detected a small amount of gold in the soil.
   金探测器在土壤中探测到了少量的黄金。