These dwarfs had long been predicted to exist, but they have only recently been spotted in space.
很早之前就预言了这些矮星的存在，但最近才在太空中发现它们。
The event had long been predicted by theory but never confirmed.
很久以前就有理论推测会发生这种情况，但是从未得到过证实。
The event had long been predicted by theory but never confirmed.
良久以前就有理论猜测会发生这种情形，可是年夜未获得过证实。
The event had long been predicted by theory but never confirmed.
良久以前就有理论猜测会发生这种情形，可是年夜未获得过证实。
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