在生理学课上老师打了个比方，将人的心脏比作水泵。
In physiology class the teacher drew an analogy between the human heart and the pump.
老师讲得很慢，以便能让学生理解他。
The teacher spoke very slowly so that he could make himself understood.
每课后老师还会设计一些实际场景练习，帮助学生理解对话内容，并练习如何正确使用。
A certain field task is designed in each lesson, which is very applicable for students.
每课后老师还会设计一些实际场景练习，帮助学生理解对话内容，并练习如何正确使用。
A certain field task is designed in each lesson, which is very applicable for students.
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