道路横断面设计是道路设计的重要组成部分。
The cross section design is an important part of the road design.
本文介绍一种不放线路中桩测绘横断面图的方法。
A method of surveying cross section map is introduced unwanted center line piles.
设计：以诊断为依据、社区为基础的横断面研究。
DESIGN: a cross-sectional study according to the diagnosis and on the basis of community.
目的：通过大样本横断面研究，初步探讨睡眠时间、身体活动水平和肥胖的关系。
Objective To investigate the relation of sleep duration and physical activity (PA) level to obesity.
目的：通过大样本横断面研究，初步探讨睡眠时间、身体活动水平和肥胖的关系。
Objective To investigate the relation of sleep duration and physical activity (PA) level to obesity.
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