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
His collection of paintings is most impressive.
他的绘画收藏令人叹为观止。
What is not wisdom is danger.
不智的事是危险的。
As a great many people will be visiting the country, the government will be building new hotels, an immense stadium, and a new Olympic-standard swimming pool.