Astronomical research began to spread over the whole range of electromagnetic waves.
天文研究开始向整个电磁波谱范围延拓。
Surface subsidence range is limited which can not spread to neighborhood of the dam.
地面塌陷范围有限，不会波及到大坝附近；
Surface subsidence range is limited which can not spread to neighborhood of the dam.
地面塌陷范围有限，不会波及到大坝附近；
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