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关注：1
2013-05-23 12:21
求翻译：直到最近天文学家才开始研究黑洞是什么意思？ 待解决
 悬赏分：1
- 离问题结束还有
直到最近天文学家才开始研究黑洞
问题补充： |
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2013-05-23 12:21:38
Until recently astronomers began to study black holes
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2013-05-23 12:23:18
Until recently scientists have begun to study black holes
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2013-05-23 12:24:58
Only then starts until the recent astronomer to study the black hole
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2013-05-23 12:26:38
Until recently, astronomers began to study black holes
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2013-05-23 12:28:18
astronomers until only recently began to study black holes;
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