draw materials

The piston pump can draw back excessive oil to prevent stains on materials.

活塞泵还可将多余的机油抽回，因此可防止布料受到污染。

Many SWFs draw their income mainly from raw materials, such as crude oil, and they are now seeking to reinvest this cash back into the commodities market.

许多主权财富基金的主要收益就来自包括原油在内的原材料，而目前，它们正寻求将这些现金再投资到大宗商品市场中去。

Study the application of the local buildings to the materials, and learn the local architectural concept, and draw lessons for the local real estate development and construction.

考察当地建筑对材料的应用，学习当地的建筑理念，为本土的房地产开发建设吸取经验。

The authors make use of some classical theories to draw forth their hypotheses. Then they use the materials from economics specialty of Beijing Normal University and social work specialty of China Youth College of Political Science.

笔者利用一些经典的理论提出了问题的假设，笔者以北京师范大学经济学专业以及中国青年政治学院社会工作专业为例，进行了详细的分析，逐一论证所提出的假设。

Third, we have to draw up teaching materials.

第三, 是教材问题.