1、The mob boss was involved in racketeering, extorting money from businesses in the city.
黑帮头目参与了勒索勾当，从城市的企业敲诈钱财。

2、The authorities cracked down on a racketeering operation that was exploiting vulnerable immigrants.
当局打击了一个剥削弱势移民的勒索勾当行动。