They cynically tried to trade off a reduction in the slaughter of dolphins against a resumption of commercial whaling.他们见利忘义地试图以减少屠杀海豚数量作为交换条件,重启商业捕鲸。The saboteurs had demanded money in return for revealing how they hacked into the systems.那些故意破坏者索要钱财,以作为透露自己是如何非法进入该电脑系统的交换条件。They offered to ease sanctions in return for UN inspectors being allowed into the country.他们提出放松制裁,作为交换条件,该国应允许联合国监察员进入。