1.   In one case, a market trader offered cheap sunglasses, claiming they protected the wearer from ultraviolet solar rays.

2.   Two astronauts stood ready for their space walk and repair mission, but the problem was solved and the solar rays rolled into position.

3.   But in the next several weeks as solar rays become less direct in the Northern Hemisphere, the weather will surely respond.

4.   During the northern winter, direct solar rays focus on the Southern Hemisphere while oblique rays reach northern latitudes.

5.   During the next several weeks, however, as solar rays become less direct in the Northern Hemisphere, the weather will surely respond.

6.   Here, where we live, gravity holds us and solar rays bombard us.

7.   High in the atmosphere, ozone forms a shield that protects the Earth from harmful solar rays.

8.   High-altitude ozone is a heavy form of oxygen gas that protects animal and plant life from harmful solar rays.

9.   In the past, solar rays and X-rays have been linked with skin cancer many years after exposure.

a. + ray >>共 129
ultraviolet 25.34%
light 7.76%
harmful 6.85%
first 4.34%
direct 3.88%
solar 3.42%
infrared 2.28%
ultra-violet 2.05%
last 2.05%
burning 1.60%
solar + n. >>共 217
energy 15.38%
power 15.30%
eclipse 8.63%
wing 6.33%
radiation 5.10%
array 4.61%
activity 2.06%
heat 1.81%
sail 1.81%
heating 1.64%
ray 1.23%
每页显示:    共 15