MR children's ability of estimation of duration improved along with the growth of age.
随着年龄的增长，智力落后儿童的时距估计水平逐步提高。
Project estimation tools provide estimates of effort and duration based on the available information.
项目估算工具根据可用信息提供工作及持续时间的估计。
It presents a useful methodology of cell coverage estimation for TD-SCDMA cellular network based on a duration outage criterion, and gives quantitative results.
基于持续服务中断原则对TD-SCDMA系统的反向链路小区覆盖范围进行了理论分析，并给出了数值结果。
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