ADJ of, relating to, or seen in a vision, apparition, etc 虚幻的; 幻影中看见的; 幻影的
Memory is real, he is not visional.
回忆是真的，他不是幻影。
What this game uses is a visional engine of the name.
该游戏使用的是着名的虚幻引擎。
Visional feature extraction, high dimensional indexing mechanism and relevance feedback are three important issues in content-based image retrieval.
低层视觉特征提取、高维数据索引机制和相关反馈方法是面向大规模图像库基于内容检索的三个关键问题。
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