1、What this game uses is a visional engine of the name.
該游戲使用的是著名的虛幻引擎。

2、False it is visional it is empty.
假，就是虛幻，就是空。

3、The etiology, duration and the severity of RD affected the visional acuity of operated eyes.
RD的病因、病程及病情嚴重程度是影響手術后視力的因素。

visional翻譯