understratum

基本解释

Cause: one of the polychromatic overprint , understratum ink is not completely dry is covered by surface ink;
原因：其一多色叠印时，底层油墨尚未完全干燥即被表面油墨所遮盖；
For example, in the research of amalgamation problem between AIS and radar target, it can provide understratum chart platform.
如在AIS与雷达目标融合问题的研究中，可以提供底层海图平台。
Basing itself on realism, understratum narration will continue to explore the possibility of human existence and innovation of literary types.
在现实主义的沃土上，底层叙述将继续探索人的存在的可能性和文学形式创新的可能性。