这句英语怎么理解?
itbecameabundantlclearhowcomplexithasbecometoworkoutinternationalagreementsrelatingtotheenvironmentbecauseofeconomicconcernsuniquetoeachcountry.
看到这么长的句子就头晕,该怎么来理解这句话?有什么技巧吗