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.
他們只不過是其中的一小撮 。
2.help reduce the gradual weight gain common during adulthood and beneficially contribute to the prevention of obesity.
prevention預防
We need a positive program of crime prevention.
我們需要制訂一個能有效預防犯罪的方案 。