Translation of "Unbroken" in Chinese

How could there be unbroken eggs under a toppled nest?

覆巢之下無完卵。

In nostalgic moments we may tend to think of childhood as a time of almost unbroken happiness.

在懷念舊日時光的時刻，我們可能往往想起童年像是有著幾乎完整幸福的一段時期。