The concept of a room with graphics projected from behind the walls was invented at EVL in 1992.

具有墙后投影生成图像的房间的概念是1992年在EVL发明的。

Only anemia in patients enrolled in Group EVL showed a trend toward the features of microcytic , hypochromic anemia.

仅EVL组的贫血患者表现出小细胞低色素性贫血的倾向。

Subtle nursing can improve safety and achievement ratio of EVL , which complications of bleeding could be also prevented.

精心的护理可提高EVL 的安全性和成功率，防止大出血并发症。