凹痕 削弱 减少 齿英释中释
Eight years of effort have hardly put a dent in drug trafficking..八年的努力几乎没有减少贩毒活动。
make a dent,产生印象；引起注意
dent resistance,耐冲击性
make a dent in,v. 削弱；[口]取得有效进展
