日本一直在努力控制核危机，但是核辐射的蔓延已经引起了人们对核安全的担忧。
Japan has been trying to bring its nuclear crisis under control, but the spread of radiation has raised concerns about the safety of the nuclear energy.
铁块会一直加热，直到到达某一燃点，便会辐射出光来；而当它的光线穿过一块棱柱时，棱柱就会分割光线，形成光谱。
This light is passed through a prism, which breaks it up into a spectrum, and a unique pattern, kind of like a chemical fingerprint of spectral lines for that element appears.
从行为怪癖到脑癌，数年来研究人员一直在寻找与手机辐射有关的健康风险。
From behavioral quirks to brain cancer, researchers have looked for any health risks associated with cellphone radiation for years.
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