The researchers presented the map at this week's 41st Lunar and Planetary Science Conference near Houston.
本周，在休斯顿附近召开的第41届月球与行星科学大会上，研究者们公开展示了这幅地图。
They announced the discovery recently at the 40th Lunar and Planetary Conference and at the Proceedings of the International Workshop Advances in Cosmic Ray Science.
他们是最近在第40届月球和新球大会上，以及宇宙射线科学国际研讨会活动上宣布了此次发现。
They announced the discovery recently at the 40th Lunar and Planetary Conference and at the Proceedings of the International Workshop Advances in Cosmic Ray Science.
他们是最近在第40届月球和新球大会上，以及宇宙射线科学国际研讨会活动上宣布了此次发现。
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