Aldrin relied on a felt-tip marker, since the non-conductive tip would close the contact without shorting it out, or causing a spark.
奥尔德林当时使用的是毡制粗头笔，它的尖头是不导电的，接触开关不会造成短路或引发火花。
2
The southern margin of the orebody corresponds with the Footwall Quartzite Marker (MO3-MO4 contact) while the northern margin is based on an assay cut-off within zone MO2.
南缘，矿体下盘石英岩与对应的标记（mo3-mo4接触）而北部边缘是根据法截止区内模型。
3
Isaac (and his shadow) will come in contact with a "marker" on the frozen world in Dead Space 3 too…