一种叫地震仪的仪器把这种反射来的振动波转送到记录器上。

Instruments called seismometers relay these reflected vibrations to a recording instrument.

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一种叫地震仪的仪器把这种反射来的振动波转送到记录器上。

Instruments called seismometers relay these reflected vibrations to a recording instrument.

youdao