With the improvement of medical standards, people's understanding from the macro and micro SAA has been a qualitative leap.

随着医疗水平的提高，人们对于SAA的认识已从宏观微观有了质的飞跃。

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Advanced mathematics has made a qualitative leap both in ways and in subjects compared with primary mathematics. Its abstract content and logic always put students in puzzle in learning.

高等数学这门课程无论是方法上还是对象上对比初等数学都是一个质的飞跃，其内容的抽象性和逻辑性造成了相当一部分学生学习的困惑。

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