Stepped aging
[化] 阶段时效
🧩 词语组成解析
v. 踏；行走（step的过去式和过去分词）
aging
['eidʒiŋ]
n. 老化;老龄化;（酒等的）陈化;熟化;
v. 使变老;（使）长大( age的现在分词 );使显老;使变老;使苍老;
🗣️ 情景例句
It's eleven thirty.
十一 点半。
It took him a long time to make up his mind.
下决心花了他很长时间。
The bat together with the balls was stolen.
球拍和球全被偷了。