With the development of research in foreign language teaching, more and more attention has been paid to the impact of native language upon foreign language learning.

随着外语教学研究的不断深入，母语对外语学习的影响越来越受到广泛重视。

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Research in foreign language teaching involves a lot of variables, such as dependent variables, independent variables, moderator variables, control variables, and intervening variables.

外语教学研究往往会牵涉到许多种变量，但主要的有这样五种，即因变量、自变量、调节变量、介入变量以及控制变量。

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Since the early 1970s, the focus of research in foreign language teaching has been moving from "how to teach" to "how to learn", and many language studies have been taken from learners' perspective.

自从七十年代早期外语教学研究领域的重点由“如何教”转向“如何学”以来，外语教学研究的重点也慢慢转向学习者因素。

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