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1.sunspot n. 太陽黑子；雀斑
The broadcast was snapped for a few seconds by the sunspot activity.
太陽黑子運動使廣播突然中斷了幾秒鐘。
2.electromagnetic adj. 電磁的
Some people are worried that electromagnetic fields from electric power lines could increase the risk of cancer.
有些人擔心輸電線的電磁場可能增加致癌幾率。
3.ejection n. 噴出；排出物
Radioactivity is the ejection of particles or radiation from the nucleus.
放射性是原子從核中射出粒子或輻射的現象。
4.interval n. 間隔；間距；幕間休息
The process is repeated after a short interval of time.
該程序間隔很短時間就重復一次。
