At present, it is still a virgin field in studying station pipeline data model.
目前，针对站场管道数据模型的研究仍处于起步阶段。
It occurs much less in the area which the weather is cool, irrigation system is available, and the field is a virgin soil for planting tomatoes.
气候较冷凉、灌溉条件便利、从未种植过番茄、亩保苗数合理的地区丛生株发生率较低。
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