sounding by echo

sounding by echo的基本解释

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回声测深

与sounding by echo相关的网络例句 [注：此内容来源于网络，仅供参考]

These structures had been detected years earlier by echo-sounding instruments, but they had never been penetrated in the course of drilling.

这些结构在早些年被回声探测器探测过，但是它们在探测过程中从未被穿透。