Developed blade area
[化] 展开叶片面积
🧩 词语组成解析
a. 发达的（国家或地区）；成熟的
blade
[bled]
n. 刀片，剑;（壳、草等的）叶片;桨叶;浮华少年;
area
['ɛrɪə]
n. 地区;区域，范围;面积，平地;领域;
🗣️ 情景例句
African athletes are good at track and field events.
非洲选手擅长田径项目。
Someone is using the phone.
有人在用电话。
Well, would you like something to drink? What about a glass of milk?
你想喝些什么吗？要不要一杯牛奶？