快速答案
estimar 给出有依据的估计；calcular 通过数据或运算得出数值。
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
estimar
to estimate or value
Use estimar for forming an approximate quantity or holding someone in esteem.
calcular
to calculate
Use calcular for deriving a value through data, rules, or mathematical operations.
如何选择
- estimar: Choose estimar if the sentence points to forming an approximate quantity or holding someone in esteem.
- calcular: Choose calcular if the sentence points to deriving a value through data, rules, or mathematical operations.
例句
Estimamos o custo em vinte mil reais.
We estimate the cost at twenty thousand reais.
O sistema calculou o imposto automaticamente.
The system calculated the tax automatically.
常见误区
A calculated result can still be an estimate, but calcular describes the method while estimar describes its approximate status.
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 estimar，一次用 calcular。如果两个版本都可以，说明意思怎样变化。