据报道，反对派已经在国家博物馆周围建起了警戒线，这无疑是一好的预兆。

It is certainly a good sign that the rebels are reported to have thrown up a protective cordon around the National Museum.

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因此，这种始终贯穿于副高脊线“重建”过程中的双脊线现象为副高脊线的不连续南撤提供了重要的前期征兆。

Therefore, the phenomenon of double SH ridge which consecutively impenetrates during its rebuilding provides the important omen for the discontinuous southward withdrawal of the SH ridge.

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在地震预测第一线的实践中，发现一个具有显示地体构造运动和地震短临前兆意义的小震组合。

It is discovered that a combination pattern of small earthquakes manifest the significance of massif tectonic movement and short-term and imminent earthquake precursor.

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