Coal grading
[建] 煤的分级
🧩 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;
[经] 分级, 归类
🗣️ 情景例句
Many students are working at part time jobs.
许多学生兼职打工。
There is a natural coyness about her behavior.
她的举止令人有种自然的羞答答的感觉。
Good morning.
早上好。