During the first 90 Martian days, or sols, after its May 25, 2008, landing on an arctic plain of Mars, NASA's Phoenix Mars Lander dug several trenches in the workspace reachable with the lander's robotic arm.
在第90个火星日的头一天,在2008年5月25日,降落在火星北极平原的凤凰号,目前仍然在使用机械臂进行挖掘工作