Coal preparation
[建] 选煤
🧩 词语组成解析
coal
[kol]
n. 煤;煤块;煤堆;木炭;
vi. 上煤;加煤;
vt. 给…加煤;把…烧成炭;
🗣️ 情景例句
It has been a learning experience. That's true.
这真是一次学习经验， 真的。
No. I've been visiting relatives.
没有，我走亲戚去了。
electronic goods and drug manufacturing.
-- 电子产品和药品的生产。