A spokesman for Japan's Ministry of Defense said he was not immediately able to comment on the reports.
日本防务省的发言人表示他无法就此报道马上做出评论。
Swiftness: For RSS feed, once I hit submit on this post, you are immediately able to see the post when you re-update the feed.
迅速:对RSS源,一旦我点击提交文章,你更新RSS源时就会立刻看到。
NASA radar astronomers picked up its track on Friday and were immediately able to narrow its position to within one kilometer — 50 times better than their previous best estimate.
NASA的雷达天文学家周五发现了它的轨迹,并立即将它的位置精确至一公里以内的区域,比此前最好的估计精确了50倍。
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