第二语言学习者所犯的错误一直是语言学家和外语教师关注的焦点。
The errors made by foreign language learner are always the focus of linguists and foreign language teachers.
外语课堂教学是学习者习得第二语言的重要环节，教师话语是组织课堂教学、培养学生交际能力的关键。
Foreign language teaching plays an important role in learner's second language acquisition and teacher talk is the key to organizing class and fostering students' communicative competence.
摘要教授外语学习者或第二外语学习者成语，对教师来说仍是一种挑战。
Teaching idioms has remained a challenge in the EFL or SLA classrooms.
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