they rely on depositors (储户) not to demand payment all at the same time.这句话什么意思?
Banks are not ordinarily prepared to pay out all accounts; they rely on depositors (储户) not to demand payment all at the same time. If depositors should come to fear that a bank is not safe, that it cannot pay off all its depositors, then that fear might cause all the depositors to appear on the same day. If they did, the bank could not pay all accounts.
they rely on depositors (储户) not to demand payment all at the same time.