柯林斯英汉双解大词典
sunspot /ˈsʌnˌspɒt/
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1.
N-COUNT Sunspots are dark cool patches that appear on the surface of the sun and last for about a week. 黑子; 日斑
双语例句权威例句
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Anyway, Wolf went though all records from various observatories in Europe and put together a history of sunspot observations going back about 100 years.
不论如何，沃尔夫查阅了欧洲各个天文台的所有记录，并把大约100年前的太阳黑子观测历史整理在一起。
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On Earth, among the surest indications of sunspot cycles are believed to be the rate that trees grow, as seen in the rings visible in the cross sections of their trunks.
在地球上，人们认为，表明太阳黑子周期最可靠的迹象之一是树木的生长速度，就像树干横截面上可见的年轮一样。
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