Astronomers could gain only a biased idea of the universe when they were limited to the narrow wavelength band of visible rays.
由于只能在可见光的狭窄波段内观测，天文学家关于宇宙的概念显然只能是片面的。
The extension of astronomy from visible light to radio waves to x-rays and gamma rays never failed to lead to the discovery of unusual objects such as radio galaxies, quasars, and pulsars.
从可见光扩展到无线电波，再到X 射线和伽马射线，天文学总是会发现不寻常的物体，如射电星系、类星体和脉冲星。
Related cloaks have been made to work with infrared rays and visible light.
并已制造了可在红外光和可见光波段工作的隐身器件。
These rays would not be visible to our eyes.
人眼是看不见这些射线的。
When gamma rays hit Earth's upper atmosphere, they produce showers of particles that result in brief flashes of visible light, called Cherenkov light.
当伽马射线冲击地球高层大气的时候，就会产生一阵阵粒子流，粒子流导致短暂的可见光闪烁，这种光被称为“切伦科夫光”。
A roughly spherical, expanding shock wave is visible in X-rays.
利用X光波段，可以观测到一个大致上呈现球形膨胀的震波。
ROS is naturally produced in the body by exposure to UV rays, leading to skin damage and visible signs of ageing.
ROS指人体暴露在紫外线照射下，自然产生的化学反应，及其产生对皮肤的损伤，以及一段时间内（晒伤）明显的症状。
ROS is naturally produced in the body by exposure to UV rays, leading to skin damage and visible signs of ageing.
ROS指人体暴露在紫外线照射下，自然产生的化学反应，及其产生对皮肤的损伤，以及一段时间内（晒伤）明显的症状。
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