Don't laugh. In the beginner's class,they give you a chance to rest between exercises.
别笑。在初级课程中你有机会休息。
Light troubles speak; great troubles are silent.
小困难,大声叫嚷;大困难,闷生不响。
and there is a very firm rule that the bank has no right or authority to pay out a customer's money on a cheque on which its customer's signature has been forged.