The luminouseffect visible in the Russian and Romanian videos is due to the the sun being low in the sky.
在俄罗斯和罗马尼亚拍到的视频中，看到的发光现象是因为正好太阳落下，给云层嵌上发光的外环。
2
The slippers in common use by wearers do not have the luminouseffect, so the wearers are difficult to find the slippers when getting up at night.
我们平常穿的拖鞋是不会发光的，晚上起床时很难找到拖鞋。
3
The rare earth oxides prepared by the method have a spherical shape, and therefore, materials prepared by using the rare earth oxides have remarkable luminouseffect.