Investment banks are very different in that a pure investment bank does not accept deposits and it doesn't make loans; it's an underwriter for securities.

投资银行是完全不同的,单纯的投资银行既不吸收存款,也不发放贷款,投行是证券承销商

耶鲁公开课 - 金融市场课程节选

The traditional commercial bank would accept deposits from businesses and make loans to businesses.

早期的商业银行吸收商业存款,并发放商业贷款

耶鲁公开课 - 金融市场课程节选

In other words, the banks were like customers of the Bank of England; they had to keep deposits there and the Bank of England watched them to make sure that they were behaving responsibly and had authority over them because it had market power.

换句话说，其他银行在英国就像是英国银行的客户;,其他银行不得不把钱存放在英国银行那,英国银行业负责监管着,其他银行的商业行为,也指挥着其他银行,因为英国银行有着控制市场的力量。

耶鲁公开课 - 金融市场课程节选

Then later on,whenever you want, you can take your money out Meanwhile, they invest the deposits some way or another at a higher interest rate than they pay on the deposits and they make the difference and that's how they make a profit.

然后你什么时候需要你就可以把钱取出来,同时储蓄机构以比给你的利息,更高的利息储蓄,或者投资，这就出现了差价,这就是储蓄机构盈利的方法。

耶鲁公开课 - 金融市场课程节选