但是，他没能再启美韩两国业已搁置的自由贸易协定。
But he failed to revive a stalled free-trade agreement with South Korea.
在数学教学中，数学之美感能使人们达到以美启智，进而提高学生理解问题的能力。
In math teaching, math beauty can stimulate the students intelligence and increase their ability to comprehend problems.
本文简述了数学美的主要内容、具体体现以及数学的“以美启真”教学原则。
This paper gives a brief account about the main contents and specific embodiment of maths beauty and the maths teaching principle of "Enlightening the truth through the beauty".
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