The advantage of this approach is you only incur the expense of obtaining the value when and if you need it.
这种方法的好处是只有当需要它时或如果需要它时，才会花费一些开销来得到该值。
2
Some may object that many companies are hardly in a position at present to incur the expense.
某些人可能会表示反对，认为目前许多公司很难承受这笔费用。
3
Our rental company does not want to incur the expense of training or hiring staff competent in full-fledged component environments such as J2EE or.net.