Oh, you're looking for the English word for "老化"? It's "aging." Sometimes, people also use "ageing," but "aging" is more common in American English. You know, like how we talk about the aging population in 2022, or the aging infrastructure in a certain city, or the aging of a product that cost a lot of money back then. It's a natural part of life, you know, aging, but sometimes it catches us off guard, doesn't it?
Old age.
哟，老化这个词语在英文里咱们叫作 "aging"。比如说，皮肤老化咱们就说 "skin aging"。这个词语用得挺广的，不管是化妆品广告还是医学研究，你都能看到它。我记得前几年，我还看过一篇关于食品添加剂的研究，里面就有提到如何减缓食品的 aging，也就是延长保质期啦。说实话，我当时也没想明白，老化这个概念怎么还用到食品上了，不过现在想想，挺有道理的，毕竟保质期就是防止食品过早 aging嘛。哈扯远了。总之，老化在英文里就是 "aging"。