成日發夢中夢

"成日發夢中夢" 這句話直譯為英文是 "I often have dreams within dreams."

如果你想要表達的是你經常做夢，而且這些夢中還有其他的夢境層次，那麼你可以這樣說：

"I often have dreams where I experience another dream within the dream."

或者更簡單地說：

"I often have lucid dreams or dreams within dreams."

如果你想要表達的是你想要做夢，或者你想要做某種特定的夢，那麼你可以這樣說：

"I wish I could have a dream where I am successful."

或者：

"I hope to have a dream about traveling to space tonight."

請根據你的實際意思選擇合適的表達方式。