嫦娥四号月球探测器在月球背面（暗面）降落并轻轻地着陆，揭开了人类太空探索历史的新篇章。
Chang'e 4 lunar probe landed on the moon's far side (dark side) and softly touched down, which opened a new page in history of mankind's space exploration.
有时，天文学家们碰巧从侧面观察到系外行星的轨道，在这种情况下，行星在围绕恒星旋转的时候就会交替地呈现出有时光面较多、有时暗面较多。
Sometimes, they happen to see the orbits of exoplanets edge-on. In those cases, the planet alternately shows more of its dayside and then more of its nightside as it circles its star.
在我们往家跑时，急急匆匆地，也顾不上谈论刚才遇见希刺克厉夫的事。可是我本能地看透了凯瑟琳的心如今已布满了双重的暗云。
Our hurry prevented any comment on the encounter with Heathcliff, as we stretched towards home; but I divined instinctively that Catherine's heart was clouded now in double darkness.
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