For investors eager to put more money into private equity, the club deals have raised concerns about riskconcentration.
对于那些急于将更多的资金投入私人股本的投资者，帮会交易已经对风险的集中提出了担忧。
2
Such information can be used to work out ash concentration and thus determine the risk to aircraft engines.
垂直高度信息可以用于计算火山灰浓度，从而确定其对飞机发动机产生的风险。
3
Studies have shown that consuming moderate amounts of coffee (about 3 to 4 cups a day) may improve mood and concentration, and reduce the risk of type 2 diabetes and several types of cancer.