occultation發音名詞1掩星、星蝕天文Astronomers recorded the occultation of a bright star by the moon.天文學家記錄了月球遮掩一顆亮星的掩星現象。2遮蔽、隱沒正式The occultation of the sun by thick clouds darkened the valley.太陽被厚雲遮蔽,整座山谷暗了下來。