1）翻译下面的句子：生活中总是充满了起起落落，没有什么是一成不变的。
Life is always full of ups and downs ans there is nothing that lasts forever.
2）结合自己的生活、学习、工作、兴趣等，先想象在什么语境下会用到这个表达，然后再进行造句。
场景：对于理念论者来讲，除了变幻莫测的物质世界之外，存在着不变的理念。但是这些不变的理念是如何与物质世界的质料互相运作的机制还是个大问题。
造句：Although things are changing in this physical world, for the believers of Idealism, there is something that can last forever, like the ideas of good, beauty and justice, while how these ideas work with materials of the physical world remains a big philosophical question.
