Coom
n. 煤烟\\n[建] 煤烟, 炭黑
🗣️ 情景例句
Don't be lazy, the older you get, the harder it will be to learn.
别偷懒，年纪越大，学起来就越难。
There may be different ways of doing business.
有很多不同的方式。
electronic goods and drug manufacturing.
-- 电子产品和药品的生产。