Developed length
[化] 展开长度
🧩 词语组成解析
a. 发达的（国家或地区）；成熟的
🗣️ 情景例句
How much extra do I have to pay for that?
我还要另外付多少？
Learn young,learn fair.
为学趁年青，既学须学好。
suggested an idea on which he had been working for many years to the British Government and industrial circles.
他向英国政府和工业界提出了他研究多年的一项计划。