They left the orbitinglaboratory about 98 percent complete after 11 years of construction.
经过十一年的建造，轨道实验室已完成了百分之九十八。
2
Still, at some point the mission will end, and the orbitinglaboratory will be directed to plunge toward Earth.
尽管如此，终有一刻使命会结束，轨道实验室将被引导回归地球。
3
"This is what the ISS was meant to be -- a truly international orbitinglaboratory," said Steve Payne, a NASA test director at the Kennedy Space Center.