Checking the unit price on the shelf tag, which expresses the cost divided by quantity, is a key way to find the best deal.
查看货物架上的单价标签，它显示的是被分为单位商品的价格，是寻找最好价格的主要方法。
2
Unit testing provides verification that the code does what is expected, not just spell-checking your typing.
单元测试检验代码是否做了开发人员希望它做的事儿，而不只是对类型进行拼写检查。
3
For example, you can integrate Purify with your unit or smoke test suite that developers must run before checking in any code changes and require them to fix any new memory errors reported by Purify.