Our English teachers took the English oral course in their spare time to improve their teaching skills.
我们的英语老师在业余时间上英语口语课，以提高他们的教学技能。
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The teachers must be free to teach in their own way — the curriculum should be flexible enough so that they can use their individual talents to achieve the goals of the course.
The teachers must be free to teach in their own way—the curriculum should be flexible enough so that they can use their individual talents to achieve the goals of the course.