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
Can I speak to Betty?
我能跟Betty说话吗?
What do you like best, apples, pears, or bananas?
苹果，梨，香蕉，你最喜欢哪个？
but ten months later, she received a letter from a girl in Holland.
但10个月以后，她收到了荷兰一位姑娘的来信。