求翻译：作为教师来说，必须精心准备和设计每一堂课的内容、进展、互动的环节等等，教师作为是课堂教学的主导者和组织者，课前准备的时间和精力往往比课堂教学要多。是什么意思？

As a teacher, it must be carefully prepared and designed the content of each lesson, progress, interactive links, etc., is the classroom teacher as the leader and organizer, pre-class preparation time and effort to be more often than classroom teaching.

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As the teacher, must carefully prepare and design each hall class content, progress, interaction link and so on, the teacher achievement are the classroom instruction leadership and the organizer, the time and the energy which in front of the class prepares often must be more than the classroom inst

As teachers, must be carefully prepared and designed each class progress, interactive content, links and so on, as is the leader and organizer of classroom teaching of teachers, class warm up time and effort more often than classroom teaching.

As teachers, must be carefully prepared and designed each class progress, interactive content, links and so on, as is the leader and organizer of classroom teaching of teachers, class warm up time and effort more often than classroom teaching.