问问题描述
previous是什么意思，在线蹲一个救命答案，感谢！
答精选答案
previous best以前最好 例句:1.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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本文概览：previous best以前最好 例句:1.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