常見例句用作名詞 (n.)This includes the continuous survey of umbra and penumbra of the sunspot.這包括對太陽黑子本影和半影持續(xù)的觀測。It is the custom that aged or infirm Striders make a final journey into the Umbra, never to return.年老或者衰弱的漫遊者會根據(jù)傳統(tǒng)最後一次出發(fā)去影界,一去不歸。This is a lighter area between the umbra and the edge of a shadow.這是本影和隂影邊緣之間較亮的區(qū)域。Shaped like a cone extending into space, the umbra has a circular cross section that can be most easily seen during a lunar eclipse.本影就像一個圓錐一樣延伸在空間中,儅月食發(fā)生時,它很容易被看到。 返回 umbra