快速答案
novo 通常表示新或近期出现；jovem 表示年轻。
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
novo
new
Use novo for something recently made, bought, received, or new to its owner.
jovem
young
Use jovem for a person or living being with relatively few years of age.
如何选择
- novo: Choose novo if the sentence points to something recently made, bought, received, or new to its owner.
- jovem: Choose jovem if the sentence points to a person or living being with relatively few years of age.
例句
Comprei um celular novo.
I bought a new phone.
A médica é jovem.
The doctor is young.
常见误区
A person can be novo in some regional or informal uses, but jovem is the clear neutral choice for “young.”
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 novo，一次用 jovem。如果两个版本都可以，说明意思怎样变化。