介绍地层变化复杂，无明显对比标志地区如何利用模拟测井曲线进行岩、煤层综合对比。
How to use simulated logging curve makes a synthetical contrast of rock and coal seam at complicated stratum and no obvious mark area are introduced.
汽车市场的不景气也是表明零售业情况不佳的主要标志，因为零售业与降雪和严寒并无明显的关联。
A weaker market for auto also is the chief evidence to date of trouble in retail trade that is not clearly related to snow and cold.
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