蜜芽传媒 Learning English - 蜜芽传媒 Media English “媒体英语”：Are rocks discovered on Mars a sign of potential past life? 科学家在火星上发现的岩石会是生命存在过的迹象吗？ - 蜜芽传媒 Sounds
蜜芽传媒 Learning English - 蜜芽传媒 Media English “媒体英语”：Are rocks discovered on Mars a sign of potential past life? 科学家在火星上发现的岩石会是生命存在过的迹象吗？ - 蜜芽传媒 Sounds
蜜芽传媒 Media English “媒体英语”：Are rocks discovered on Mars a sign of potential past life? 科学家在火星上发现的岩石会是生命存在过的迹象吗？
Do these newly discovered rocks mean there was once life on Mars?
