两国的教育经费占国民生产总值的比例相当接近，那么，这种更高、更稳定的数学成绩是如何实现的呢？
The percentage of Gross National Product spent on education is reasonably similar in the two countries, so how is this higher and more consistent attainment in maths achieved?
哈勒尔说，做预备测验感觉很辛苦，但是看到成绩的稳定提高鼓起他的信心。
Taking pretests 'felt like hard work, ' Mr. Harrell says, but seeing steady increases in his scores boosted his confidence.
当今世界的一切都难以确定，就算是在看似稳定的房地产市场，过去的成绩也不是未来业绩的保证。
In today's uncertain world, past performance is no guarantee of future performance, even in seemingly solid markets.
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