从前，有一只小兔子叫乐乐。
他有一个神奇的时光背包，可以让他穿越到过去和未来。
一天，乐乐决定去未来看看自己长大后会成为什么样的人。
他打开了时光背包，跳进了未来的时空隧道。
当他到达未来时，发现自己已经成为了一位著名的科学家。
他发明了许多有用的东西，帮助了很多人。
乐乐非常开心，他想回到现在告诉妈妈这个好消息。
但是，当乐乐打开时光背包准备回家时，却发现背包坏了。
他无法回到现在，只能留在未来。
乐乐感到很害怕，他不知道该怎么办。
他开始想念妈妈，想念他的家。
他开始思考如何修理时光背包，以便能够回家。
经过一番努力，乐乐终于修好了时光背包。
他回到了现在，告诉妈妈他的经历。
妈妈听后非常高兴，她为乐乐感到自豪。
从那以后，乐乐更加珍惜他的时光背包，并且更加努力学习，希望将来能成为一个真正的科学家。
Once upon a time, there was a little rabbit named Happy.
He had a magical time backpack that could take him through the past and the future.
One day, Happy decided to go to the future to see what kind of person he would become when he grew up.
He opened the time backpack and jumped into the tunnel of time to the future.
When he arrived in the future, he found himself as a famous scientist.
He invented many useful things and helped many people.
Happy was very happy and wanted to go back to tell his mom the good news.
But when Happy tried to return home by opening the time backpack, he found it broken.
He couldn't go back to the present, so he had to stay in the future.
Happy felt scared and didn't know what to do.
He started to miss his mom and his home.
He began to think about how to repair the time backpack so he could go home.
After much effort, Happy finally fixed the time backpack.
He returned to the present and told his mom about his experience.
His mom was very happy to hear it and was proud of him.
Since then, Happy cherished his time backpack even more and studied harder, hoping to become a real scientist in the future.
