过去几十年的课堂互动研究证实：互动调整 (interaction modification) 是 课堂第二语言获得的关键，而三类回应性提问则是课堂上及自然对话中最易
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The second modification is the addition of the fourth interaction that is required for the collaboration.
第二个修改是附加的第四个交互（协作所需要的）。
The modification mechanism of coal and coal-pyrite surface was studied after treatment with electrolysis reduction and metal corrosion interaction.
研究了电解还原法和金属腐蚀电偶法对煤和黄铁矿表面改性的机理。
This paper introduces the interaction between biomaterials and cells and several surface modification methods for biomaterials.
本文对生物材料与细胞相互作用及表面修饰的技术方法进行了介绍。
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