The teacher prepared a well-planned lesson to ensure all students could understand the complex topic.
老师准备了一堂安排紧凑的课时，以确保所有学生都能理解这个复杂的话题。
A well-planned lesson requires thorough preparation and consideration of students' needs.
一堂安排紧凑的课时需要充分的准备和对学生需求的考虑。