快速答案
custo 把资源与生产或取得相联系；despesa 记录支出或应付费用。
可靠的方法是先判断这个词在句子里的功能，再翻译。
每个词的作用
custo
cost
Use custo for resources required to produce, acquire, operate, or achieve something.
despesa
expense
Use despesa for an outflow or charge recorded in a budget or accounting period.
如何选择
- custo: Choose custo if the sentence points to resources required to produce, acquire, operate, or achieve something.
- despesa: Choose despesa if the sentence points to an outflow or charge recorded in a budget or accounting period.
例句
O custo de produção aumentou.
The production cost increased.
A viagem gerou despesas extras.
The trip generated extra expenses.
常见误区
Accounting uses stricter classifications than everyday speech. A payment can be a despesa without being a direct production custo.
放到语境中练习
从你的真实生活中选一个句子，写两遍：一次用 custo，一次用 despesa。如果两个版本都可以，说明意思怎样变化。