单词学习:umbra 天文学/名词
umbra
/ˈʌmbrə/
1. 本影(天文学中指天体影子中完全黑暗的中心区域) 2. 暗影,阴影
During the solar eclipse, the umbra of the moon moved across the Earth's surface, and Mr. Gu explained the phenomenon to his students.
日食期间,月亮的本影在地球表面移动,顾老师向他的学生们解释这一现象。
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