这些结构在早些年曾被回声探测器探测到，但是它们从未被钻探过。
These structures had been detected years earlier by echo-sounding instruments, but they had never been penetrated in the course of drilling.
很快，切片机、回声探测器和探鱼飞机又出现了。
Soon came filleting machines, echo-sounders and spotter planes.
如果你购置了一个蝙蝠探测器，你还可以探测蝙蝠高音的回声，便知它们的位置。
If you buy a bat detector you can pick up their high-pitched echo-location calls as well.
如果你购置了一个蝙蝠探测器，你还可以探测蝙蝠高音的回声，便知它们的位置。
If you buy a bat detector you can pick up their high-pitched echo-location calls as well.
应用推荐