Double-fired heater
[化] 带两个燃烧室的加热炉
🧩 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
n. 因祸得福（电影名）
🗣️ 情景例句
at all the great places in the city.
去城市所有的好地方看看。
A handful of common sense is worth bushel of learning.
一点小常识常胜过很多有价值的学问。
Then it turned in a semicircle, ran straight again, and turned in another semicircle to the opposite side.
然后转一个半圈，再沿直线飞，再朝反方向转个半圈。