A grey area2023-12-080 PRE AI RRichard J. C. Brown * DOI：10.1038/s41567-023-02298-8原文链接原文求助分享收藏摘要 En 中文 The hectare has a long association with the metric system, but its most recent status has created some ambiguity as to its future application. Richard Brown surveys the lay of the land.
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