您即将离开北大未名BBS，访问
https://www.nasa.gov/missions/mars-2020-perseverance/perseverance-rover/nasas-perseverance-rover-deciphers-ancient-history-of-martian-lake/
该网址与北大未名BBS无关，提醒您访问时注意判断信息真伪。
继续访问