Trading revenues at all major banks were down significantly from the heydays before the credit crisis .
所有大银行的交易收入都比信贷危机前的鼎盛时期有显著下降。
However , what has vexed mr. obama as well as economists and policy makers is that apple - and many of its high-technology peers - are not nearly as avid in creating american jobs as other famous companies were in their heydays .
