ultraviolet rays

简明释义

紫外线

英英释义

例句

1.The sun emits harmful ultraviolet rays, which can cause skin damage.

太阳发出有害的紫外线，可能导致皮肤损伤。

2.Some types of lamps emit ultraviolet rays that are used for sterilization.

某些类型的灯发出用于灭菌的紫外线。

3.Wearing sunglasses can help shield your eyes from damaging ultraviolet rays.

佩戴太阳镜可以帮助保护你的眼睛免受有害的紫外线。

4.Sunscreen can protect your skin from ultraviolet rays when you're outside.

防晒霜可以保护你的皮肤免受户外紫外线的伤害。

5.Excessive exposure to ultraviolet rays can lead to skin cancer.

过度暴露在紫外线下可能导致皮肤癌。

作文

Ultraviolet rays, or 紫外线, are a form of electromagnetic radiation that comes from the sun. They are invisible to the human eye and have shorter wavelengths than visible light. Although we cannot see them, 紫外线 play a significant role in our daily lives. They are responsible for causing sunburns, tanning of the skin, and even contributing to skin cancer. Understanding 紫外线 is crucial for protecting ourselves from their harmful effects.The sun emits three types of ultraviolet rays: UVA, UVB, and UVC. Each type has different wavelengths and effects on our skin. UVA rays penetrate the skin more deeply and are primarily responsible for aging and wrinkles. UVB rays, on the other hand, are associated with sunburn and play a key role in developing skin cancer. UVC rays are absorbed by the Earth's atmosphere and do not reach the surface, making them less of a concern for humans. However, artificial sources of 紫外线, such as tanning beds, can emit these rays and pose risks.One of the most effective ways to protect ourselves from 紫外线 is by using sunscreen. Sunscreens are formulated to absorb or reflect 紫外线, thus preventing them from penetrating the skin. It is essential to choose a broad-spectrum sunscreen, which protects against both UVA and UVB rays. Additionally, wearing protective clothing, sunglasses, and seeking shade during peak sun hours can further reduce our exposure to harmful 紫外线.Beyond skin protection, 紫外线 also have beneficial effects. For instance, they help our bodies produce vitamin D, which is vital for bone health and immune function. A moderate amount of sunlight exposure can be beneficial, but it is crucial to strike a balance between enjoying the sun and protecting our skin. Education about 紫外线 and their effects is essential for promoting safe sun practices among people of all ages.Moreover, understanding the impact of 紫外线 on the environment is equally important. High levels of 紫外线 can affect ecosystems, particularly aquatic life. Increased 紫外线 exposure due to ozone layer depletion can harm phytoplankton, the foundation of the oceanic food web. This disruption can lead to significant ecological consequences, affecting fish populations and other marine organisms.In conclusion, 紫外线 are an essential part of our environment that can have both positive and negative effects. While they are necessary for vitamin D production and other benefits, excessive exposure can lead to severe health issues, including skin cancer. By understanding 紫外线 and taking appropriate precautions, we can enjoy the sun safely while minimizing the risks associated with harmful radiation. The key lies in education, awareness, and responsible sun exposure habits, ensuring that we protect ourselves and the environment from the adverse effects of 紫外线.