Double-extension method
[经] 双重扩展法
🧩 词语组成解析
double
['dʌbl]
adj. 双的;两倍的;两面派的;双人用的;
vt. 使加倍;把…对折;重复;
vi. 加倍，加倍努力;快步走;
adv. 两倍地;双重地;
n. 两倍;双精度型;
doub二，双+le反复 → 反复两倍 → 翻倍
🗣️ 情景例句
Where are the shopping carts?
购物车在哪儿？
That's terrible!
真是太惨了！
It broke down at Ferngreen station and was taken off the line.'
它在芬格林车站出了故障而被取消了。”