Here's why:
* "Le garçon" means "the boy."
* "Pas de lait" means "no milk."
You're likely missing a verb or another element to form a coherent sentence.
Here are some possible meanings you might be looking for:
* "Le garçon n'a pas de lait": This means "The boy has no milk."
* "Le garçon ne veut pas de lait": This means "The boy doesn't want milk."
* "Le garçon n'a pas besoin de lait": This means "The boy doesn't need milk."
Please provide more context or a complete sentence, and I can help you translate it correctly.