Anthracography
煤相学
🗣️ 情景例句
They're in my office.
在我办公室。
Watch out, it's dangerous.
注意，危险啊！
We are really glad to see you so constructive in helping settle the problems as regards the signing of the contract.
我们很高兴您在解决有关合同的问题上如此具有建设性。