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1.Researchers from Harvard University recommended that people replace a daily unhealthy snack with a small handful of nuts to slow down weight gain.
a handful of 少量
They constitute but a handful of the number.
他们只不过是其中的一小撮。
2.help reduce the gradual weight gain common during adulthood and beneficially contribute to the prevention of obesity.
prevention预防
We need a positive program of crime prevention.
我们需要制订一个能有效预防犯罪的方案。
