抽取

Objective To analyze depression, anxiety and the related psychological social factors, and to provide evidence for the prevention of mental diseases and mental health education. Methods A cluster stratified sample of 509 medical college students were questionnaired on epidemic features and the related factors of depression and anxiety.

目的 分析医学生抑郁、焦虑情绪症状及其相关的心理社会因素，学生心理疾病防治和健康教育工作提供依据方法分层整群抽取某医科大学本科生509名进行抑郁、焦虑情绪的流行特征及其相关因素调查分析。

Methods A cluster stratified sample of315undergraduates were investigated with a closed questionnaire,and301questionnaires were available.

采用分层整群抽样法，抽取贵州省在校大学生315名进行无记名封闭式问卷调查，获得有效问卷301份。

Methods 7 282 children aged 2 to 5 years were selected by stratified sampling from twelve software.

分层随机抽取我国12个省市7 282名2～5岁儿童作为研究对象。

Methods With stratified clustered sampling method, 375 college students were chosen to complete the questionnaire.

采用分层随机抽样方法，在杭州市的大学中抽取大学生375名进行问卷调查。

Methods Based on stratified sampling, 363 medical facilities were selected to conduct the survey.

采取分层抽样方法在全国范围内抽取363家医疗机构开展调查。

The sampling population of this study is girls at five-year, two-year, four-year and two-year technology of a selected college of commerce in Taipei City in stratified random sampling selection with class as sampling unit. A total of 424 girls are included in the formal survey and 405 valid questionnaires collected.

本研究以国立台北市某技术学院在学日间部五专、二专、四技、二技等学制女学生为抽样母群，采分层随机丛集取样方式，以班级为取样单位，正式施测时共抽取424人，有效问卷405份。

With the help of the relationship of the stroker in character , it is convenient to extract its structure features .

本文的特征抽取方法就是建立在这种相关性的基础上的，对于每列情况类似。

Optical Formula Recognition is not only the sign of formula recognition, but also include the extraction of the formula, the record of two dimension structure of the formula and so on.

数学公式的识别不仅只是公式中符号的识别，其还包括了公式抽取，公式二维结构的记录等方面的研究。

According to the failure characteristics and working conditions, a test plan of submersible pumps was proposed.

按照潜水电泵的失效特征和工作条件制定了潜水电泵的可靠性强化试验方案，并抽取试样进行了强化试验。

The goal of this item is to improve the whole process of recognizing and extracting road layer from raster map, and to make the whole process as a closed feedback system with output measurable, state controllable and recognition subprocess optimally adaptable.

本研究目标为：改进对栅格交通地图道路信息的识别抽取全过程，使之成为一个输出可测、目标可控、识别过程可自适应优化的闭环反馈识别系统。把对不同图层的识别过程作为并联的子过程控制对象，所构建的整体系统实现了其道路网络输出成为可测变量。

She gently rebuff ed him, but agreed that they could be friends

她婉言拒绝了，但同意作为朋友相处。

If in the penal farm, you were sure to be criticized.

要是在劳改农场，你等着挨绳子吧！