We know no nation can meet the challenges and seize the opportunities of the 21st century alone—all of us have to take responsibility and work together.

我们懂得，没有任何国家能够单独应对和把握21世纪的挑战与机遇——我们大家都必须承担责任，共同努力。

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Teachers in low-income urban and rural areas with no history of participating in math competitions may not know about advanced-math opportunities like Math Counts.

低收入的城乡地区的教师没有参加过数学竞赛，他们可能不知道有像 Math Counts 这样学习高数的机会。

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Let's always remember "Opportunities are only for the prepared mind" and "No pains, no gains."

让我们永远记住“机遇只青睐做好准备的人”和“不劳无获”。

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The report noted that good practice was evident in the inquiry and no investigative opportunities had been overlooked.

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Stowe Boyd is another writer who has maintained his core point of view through years of blogging and no doubt many opportunities to diversify.

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Women in urban areas have equal employment opportunities and no longer need to depend on their parents.

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