今天我们要学的词是backtrack。Backtrack, 动词，意思是改变主意，反悔。美国银行最近再度推出新的借记卡收费计划。就在几个月前， "After strong resistance from its customers, Bank of America was forced to backtrack on a monthly $5 debit card fee," 由于顾客的强烈抗议，美国银行被迫取消了每月5美元的借记卡收费。最近，美国社会对堕胎问题再度展开激烈辩论。 "Republican lawmakers in Virginia backtracked on a bill that would define life as beginning at conception," 维吉尼亚州的共和党议员在一项提案上改变了立场，该提案要求将受精卵定义为生命的开始。 好的，今天我们学习的词是backtrack...