A good, hygienic way of doing this is, not only do I not go in and change things except through a pre-defined method, I shouldn't read it other Cartesian than through a pre-defined method.

做这个的方式是，我不仅仅要通过提前定义好的方法,来改变数值,我还应该通过提前定义好的方法，来读这个值,我应该用。

麻省理工公开课 - 计算机科学及编程导论课程节选

The Fed has never given loans to anyone other than a depository institution that is a bank until last month, except they did so in the Depression.

上个月，联邦政府已经开始限制贷款业务,除了银行以外的其他金融机构,休想再放出一分钱的贷款，也就是在萧条时政府才会这么做。

耶鲁公开课 - 金融市场课程节选