屈光不正是一种非常常见的眼部疾病，使眼睛无法对外界物体清晰地聚焦，而导致视力模糊，严重的时候可以引起视力损害。
It occurs when the eye cannot clearly focus the images from the outside world. The result of refractive errors is blurred vision, which is sometimes so severe that it causes visual impairment.
严重体罚的定义是指被用同一物体打击、被踢、被掐喉咙或气管导致窒息、被闷导致窒息、被烧、被烫、被纹身、被殴打或被用武器威胁。
Severe physical punishment was defined as being hit with an object, being kicked, choked, smothered, burnt, scalded, branded, beaten or threatened with a weapon.
爱因斯坦提出万有引力是一种时空变形，在巨大的物体附近有严重的变形。
Einstein argued that gravity is really a warping of space-time, with the greatest distortions near the most massive objects.
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