I may say even a bit better! I fancy he will grow prettier, or perhaps somewhat smaller, in time.

我想他长大之后会慢慢变好看，或者到了适当的时机，也有可能缩小一点。

youdao

Mom says, "you'll be prettier when you grow up."

妈妈说：你将来会很漂亮的。

youdao

Mom says, "you'll be prettier when you grow up."

妈妈说：你将来会很漂亮的。

youdao