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lesson强调 一节课、一课时： This textbook is divided into twenty lessons. 这本教材一共分为20个课时。 此外，lesson多用于指学习某种技能的课程，比如 游泳课→ swimming lesson。 lesson除了表示课堂学到的知识，还可以指生活中得到的 经验教训： Never forget this lesson. 永远不要 ...