Since Neoid, the fault activities in Dalian area are intense which belongs to the frequently-occurring earthquake area.
自挽近时期以来，大连地区断裂活动较强烈，为一地震多发区。
At the same time they had strong adaptability in wide area, and characteristics of anti-disease and pest and were outstanding clones of poplar in Dalian area.
同时具有适应范围广、抗病虫强的特性，是大连地区杨树造林优良无性系。
For the effect of natural condition and many other factors, the utilization of water resources is very low and the problem of lacking water is serious in Dalian area.
大连地区受自然条件及多方面因素影响，水资源利用率较低，缺水问题严重。
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