英语翻译

英语翻译
Days before,the finance ministry promised the biggest single contribution—a $60 billion slug to a $430 billion increase in IMF funding which is largely aimed at alleviating concerns about the euro crisis.
参考译文：几天前,IMF为缓解欧元危机造成的紧张情绪将（可贷）资金规模扩充4300亿美元,为响应这一号召,财务部允诺注资600亿美元.
这个slug是什么意思