The contract encompasses a planned production span of 5 years and is the second such award on the US Air Force target program.
该合同包括了跨度5年的生产计划，是美国空军靶机项目第二份合同。
2
This paper introduces a kind of completely new way that we can detect and withdraw the target of particle field holograph which has a biggish dimension span.
文章介绍了一种全新检测尺寸跨度较大的粒子场全息图像的目标检测和提取方法。
3
The present study assessed the effects of visual search, attention span, spatial working memory span, multi-target tracking and speed estimated on driving-related abilities of the PTSD patients.