如果SPI小于一表示项目落后于计划。
但分析师指出，此后，ARJ21项目的进展落后于计划。
Since then, however, analysts have noted that the ARJ21 project has been running behind schedule.
12个举办城市中的九座机场的重建工作都落后于预订计划。
The 12 host cities have among them nine airport redevelopments which are well behind schedule.
当然，中国的太空计划远远落后于美国的。
China's space program lags far behind that of the U.S., of course.
但是，这辆旅行车已经落后于原定计划。迫于压力，罗杰斯不得不继续。
But the tour bus was behind schedule, and Rogers was under pressure to go on.
工程又落后于预定计划了。
我们落后于预定计划大约15分钟。
适用于南部越南人的训练程序已经落后于原计划。
The training program for the South Vietnamese was behind schedule.
适用于南部越南人的训练程序已经落后于原计划。
The training program for the South Vietnamese was behind schedule.
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