快速答案
coser 指用线缝合；cozer 指加热烹煮。
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
coser
to sew
Use coser for joining cloth or another material with thread.
cozer
to cook
Use cozer for cooking food through heat, especially boiling or baking.
如何选择
- coser: Choose coser if the sentence points to joining cloth or another material with thread.
- cozer: Choose cozer if the sentence points to cooking food through heat, especially boiling or baking.
例句
Ela aprendeu a coser à mão.
She learned to sew by hand.
Deixe o feijão cozer por mais alguns minutos.
Let the beans cook for a few more minutes.
常见误区
Both verbs sound alike in most Brazilian accents. In everyday Brazil, costurar is much more common than coser for sewing.
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 coser，一次用 cozer。如果两个版本都可以，说明意思怎样变化。