Foreign research on mental health in sociology can be traced back to 1952. Mental health of the vulnerable groups had already become the focus of that field.

国外社会学界对精神健康的研究可以追溯到1952年，弱势群体的精神状况很早就成为该领域的研究热点。

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The performance based design approach to building fire protection is a hot research field in current foreign fire science research.

建筑物性能化防火设计方法是目前国外消防科学研究中的一个前沿的热门研究领域。

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Focusing on foreign language collaborative learning research becomes a trend in the field of educational technology in foreign language teaching and learning.

在教育技术环境下外语合作学习的研究已成为现代教育技术辅助外语教与学领域中的一个热点问题。

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