| 单词 | penumbra |
| 释义 | [/pɪˈnʌmbrə; pɪˋnʌmbrə/] n (pl -brae [/-briː; -bri/] or -bras [/-brəz; -brəz/]) partly shaded area around the shadow of an opaque object (esp around the total shadow of the moon or earth in an eclipse) 半阴影; （尤指日、 月蚀的）半影. Cf 参看 umbra. |
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