快速答案
bonito 是一般赞美；lindo 通常更强烈、更赞叹。
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
bonito
pretty or beautiful
Use bonito for a positive everyday judgment about appearance.
lindo
beautiful or gorgeous
Use lindo for stronger admiration or an enthusiastic compliment.
如何选择
- bonito: Choose bonito if the sentence points to a positive everyday judgment about appearance.
- lindo: Choose lindo if the sentence points to stronger admiration or an enthusiastic compliment.
例句
O jardim está bonito.
The garden looks pretty.
Que pôr do sol lindo!
What a beautiful sunset!
常见误区
The boundary is personal, not grammatical. The words overlap, so choose by the strength and warmth you want.
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 bonito，一次用 lindo。如果两个版本都可以，说明意思怎样变化。