地面: floor, ground, surface...
失效: to fail, to lose effectiveness...
开场: to begin, to open, to start, beginning of an event...
后勤: logistics...
同学: to study at the same school, fellow student, classmate...
事先: in advance, before the event, beforehand, prior...
节: festival, section, segment, point, part, to economize, to save, temperate...
走路: to walk, to go on foot...
泥: restrained...
打印: to affix a seal, to stamp, to print out (with a printer)...
