切勿过度照射紫外线。
皮肤癌通常是因紫外线对皮肤的过度照射而造成的，主要有3种类型。
Skin cancer is usually caused by excessive exposure to UV light and there are three main kinds.
晒伤：一种急性皮肤炎症，由来自太阳光或其它光源的紫外辐射过度照射引起。 收藏。
Sunburn: Acute skin inflammation caused by overexposure to ultraviolet radiation from sunlight or other sources.
在放射治疗中照射过度和照射不足均可能对患者产生严重甚至致命的后果。
Overdosage as well as underdosage may have severe or even fatal consequences for patients undergoing radiotherapy.
放射线照射：过度的放射线照射将会导致骨质硬化。
Radiation exposure: Excessive radiation exposure will cause bony sclerosis.
放射线照射：过度的放射线照射将会导致骨质硬化。
Radiation exposure: Excessive radiation exposure will cause bony sclerosis.
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