Now the collapse mechanism of structure has not been clear, which has been a key project for earthquake researcher and civil engineer worker.

至今人们对结构在地震力作用下的倒塌破坏机理都不是很清楚，这历来一直是地震工作者和土木工作者研究的重要课题。

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Now the collapse mechanism of structure has not been clear, which has been a key project for earthquake researcher and civil engineer worker.

至今人们对结构在地震力作用下的倒塌破坏机理都不是很清楚，这历来一直是地震工作者和土木工作者研究的重要课题。

youdao