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。
Many farmers were among the victims killed by the tsunami waves, also extension workers and experts working for agricultural institutions.
在死于海啸浪潮的人当中有许多是农民，还有在农业机构工作的推广人员和专家。
Many farmers were among the victims killed by the tsunami waves, also extension workers and experts working for agricultural institutions.
在死于海啸浪潮的人当中有许多是农民，还有在农业机构工作的推广人员和专家。
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