In one of the first images transmitted back to Earth following MESSENGER's second flyby of Mercury on October 6, 2008, a spectacular and extensive system of rays can be seen.
08年10月6号，“信使号”二次飞越水星后传回地球的首批照片发现了广阔壮观的辐射纹。
UVA rays can penetrate deeply into your skin and suppress your immune system. This increases the risk of wrinkling and age spots.
UVA能穿透你的皮肤，使免疫系统的功能下降，这就增加了长皱纹和老年斑的危险。
The heliosphere shields the solar system from 90 percent of energetic cosmic rays — high-speed charged particles that would otherwise bombard the planets and harm life.
日球层就像一个盾牌，挡住了90%高能宇宙射线。 宇宙射线由高速带电粒子组成，会轰击星球并伤害生物。
A refractive defect of a lens or other optical system that prevents light rays from converging at a single point resulting in a blurred or imperfect image.
散光有折射缺陷的透镜或其它光学系统，阻碍光线汇聚于一个焦点，形成一个模糊或不完全的图象。
In the outer parts of the solar system, the sun's rays are too feeble to provide energy for spacecraft's instruments.
在太阳系的外层空间，太阳光线太弱，无法为宇宙飞船的仪器提供能量。
In the outer parts of the solar system, the sun's rays are too feeble to provide energy for spacecraft's instruments.
在太阳系的外层空间，太阳光线太弱，无法为宇宙飞船的仪器提供能量。
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