以上来源于: WordNet
A 'mysterious dark companion' has been observed for the first time in a star system which has puzzled sky-watchers since the 19th century.
一片神秘的暗影又出现了？自19世纪起，天文观测者们就在一个恒星系统中首次观测到了这种奇怪的现象，这让他们大惑不解。
Even if the scientific consensus is that extinction events don't occur in a predictable cycle, there are now other reasons to suspect a dark companion to the Sun.
即使在“物种大灭绝事件不会在一个可预测的周期中发生”这一观点上达成科学共识，我们也没有理由去怀疑太阳有一颗黑暗的伴星。
Without any companion it grew there uttering joyous leaves of dark green.
没有任何伙伴，却依然长着浓绿而欢快的叶子。
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