有些声音仅凭人耳是无法探测到的。

Some sounds cannot be ___detected by the human ear alone.

这种专业相机可以通过体温探测到被掩埋的幸存者。

The specialised camera can ___detect buried survivors by their body heat.

这套设备能够检测出水中的污染物。

The equipment can ___detect contamination in water.