Every autumn for the past six years, researchers from Durham University have given a 15-minute test to around 6, 000 four-year-olds just after they have started school.
在过去的6年里，每年秋季，杜伦大学的研究人员都会对6000个年满四岁已正式上学的儿童进行15分钟的测试。
Every autumn for the past six years, researchers from Durham University have given a 15-minute test to around 6,000 four-year-olds just after they have started school.
在过去的6年里，每年秋季，杜伦大学的研究人员都会对6000个年满四岁已正式上学的儿童进行15分钟的测试。
Every autumn for the past six years, researchers from Durham University have given a 15-minute test to around 6,000 four-year-olds just after they have started school.
在过去的6年里，每年秋季，杜伦大学的研究人员都会对6000个年满四岁已正式上学的儿童进行15分钟的测试。
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