1. Conflicts also put girls and boys at risk of sexual violence.Schoolchildren are also at risk of being forced to become soldiers.

at risk of 冒…的危险
例句：He saved three children alive at risk of his life. 
他拼命救出了三个孩子。

2. Those camps shelter more than two hundred fifty thousandrefugees from Somalia.

more than 更多
例句：Margaret needed support more than ever. 
玛格丽特比以往更需要关心。 

3. You have sort of classes of over three hundred children, and I mean just the conditions getting worse and worse."

sort of  有几分,有那么点儿
例句：I sort of thought you might say that.
我多少料到你也许会那么说。
get worse 转坏
例句：Food shortages will probably get worse towards the end of the century. 
食物短缺的情况到本世纪末可能更加严重.