求翻译：抗震设防烈度7度，设计基本地震加速度值0.1g，设计地震分组为第一组。场地土类别上海Ⅳ类，多遇地震设计特征周期0.9秒。是什么意思？

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seismic intensity 7 degrees open design, basic seismic acceleration value, 0.1 G earthquake design group for the first group. Shanghai IV venue and category, in earthquake design features more than 0.9 second cycle.

The earthquake resistance fortification intensity 7 degrees, design basic earthquake acceleration information 0.1g, the design earthquake groups for the first group.Location soil type other ShanghaiⅣThe kind, meets the seismic design characteristic cycle for 0.9 second.

Seismic fortification intensity of 7, design of basic seismic 0.1g acceleration values, design earthquake are grouped into the first group. Field soil type ⅳ class in Shanghai, characteristics of seismic design cycle 0.9 seconds.

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