ultraviolet rays

简明释义

紫外线

英英释义

例句

1.The ozone layer helps block some of the Earth's ultraviolet rays.

臭氧层有助于阻挡地球的一部分紫外线。

2.Many tanning beds emit ultraviolet rays that can increase the risk of skin cancer.

许多日光浴床会释放出紫外线，这可能增加皮肤癌的风险。

3.Wearing sunscreen can protect your skin from harmful ultraviolet rays.

涂抹防晒霜可以保护你的皮肤免受有害的紫外线。

4.Children should wear hats and sunglasses to shield themselves from ultraviolet rays.

儿童应该戴帽子和太阳镜，以保护自己免受紫外线的伤害。

5.Certain types of glass can filter out ultraviolet rays to protect indoor plants.

某些类型的玻璃可以过滤掉紫外线，以保护室内植物。

作文

Ultraviolet rays, or 紫外线, are a type of electromagnetic radiation that comes from the sun and artificial sources like tanning beds. While they are invisible to the naked eye, their effects can be quite significant. Understanding 紫外线 is crucial for both health and environmental reasons. Firstly, it is important to recognize that 紫外线 can be divided into three categories: UVA, UVB, and UVC. UVA rays penetrate the skin more deeply and are primarily responsible for premature skin aging and some types of skin cancer. UVB rays, on the other hand, are the main cause of sunburn and also contribute to skin cancer. UVC rays are the most dangerous but are mostly absorbed by the Earth's atmosphere and do not reach the surface. The health implications of exposure to 紫外线 are profound. Overexposure can lead to serious conditions such as skin cancer, cataracts, and weakened immune responses. For instance, according to the World Health Organization, around 90% of non-melanoma skin cancers are associated with 紫外线 exposure. This statistic highlights the importance of protecting oneself from harmful rays. To minimize the risks associated with 紫外线, individuals should take precautions when spending time outdoors. Wearing sunscreen with a high SPF, protective clothing, and sunglasses can significantly reduce the harmful effects of these rays. It is also advisable to seek shade during peak sunlight hours, typically between 10 a.m. and 4 p.m., when 紫外线 levels are at their highest. Moreover, it is essential to recognize that not all 紫外线 exposure is harmful. In moderation, 紫外线 can be beneficial as it helps the body produce vitamin D, which is vital for bone health and immune function. However, balance is key, as excessive exposure can lead to adverse effects. In addition to health concerns, 紫外线 also has environmental impacts. For example, increased levels of 紫外线 due to ozone layer depletion can affect aquatic ecosystems, harming phytoplankton, which forms the basis of the marine food web. This disruption can have cascading effects on fish populations and, ultimately, human food sources. In conclusion, understanding 紫外线 and its effects is vital for maintaining health and protecting the environment. Awareness and education about the dangers of overexposure are critical in preventing health issues related to 紫外线. By taking appropriate precautions and recognizing the benefits of limited exposure, individuals can enjoy the sun safely while minimizing health risks. As we continue to learn more about 紫外线 and its effects, it becomes increasingly important to foster a culture of awareness and protection against this invisible yet powerful form of radiation.

紫外线是一种电磁辐射，来自太阳和人造源，例如日光浴床。虽然它们对肉眼是不可见的，但其影响却相当显著。理解紫外线对于健康和环境原因至关重要。首先，重要的是要认识到紫外线可以分为三类：UVA、UVB和UVC。UVA射线更深地穿透皮肤，主要导致皮肤老化和某些类型的皮肤癌。另一方面，UVB射线是晒伤的主要原因，也会导致皮肤癌。UVC射线是最危险的，但大多数被地球大气层吸收，不会到达地表。过度暴露于紫外线的健康影响深远。过度暴露可能导致严重疾病，例如皮肤癌、白内障和免疫反应减弱。例如，根据世界卫生组织的数据，约90%的非黑色素瘤皮肤癌与紫外线暴露有关。这一统计数据突显了保护自己免受有害射线影响的重要性。为了减少与紫外线相关的风险，个人在户外活动时应采取预防措施。使用高SPF的防晒霜、穿着保护性衣物和佩戴太阳镜可以显著减少这些射线的有害影响。在阳光最强烈的时间段（通常是上午10点到下午4点）寻求阴凉处也是明智之举，因为此时紫外线水平最高。此外，必须认识到并非所有的紫外线暴露都是有害的。适度的紫外线暴露是有益的，因为它有助于身体产生维生素D，这对骨骼健康和免疫功能至关重要。然而，平衡是关键，因为过度暴露可能导致不良影响。除了健康问题外，紫外线还对环境产生影响。例如，由于臭氧层耗竭，紫外线水平的增加可能会影响水生生态系统，损害浮游植物，而浮游植物是海洋食物链的基础。这种破坏可能对鱼类种群产生连锁反应，最终影响人类的食物来源。总之，理解紫外线及其影响对于维护健康和保护环境至关重要。提高对过度暴露危险的认识和教育对于预防与紫外线相关的健康问题至关重要。通过采取适当的预防措施，并认识到有限暴露的好处，个人可以安全地享受阳光，同时最大程度地减少健康风险。随着我们对紫外线及其影响的了解不断加深，培养对这种无形但强大的辐射形式的意识和保护文化变得愈加重要。