Ultracracking
超加氢裂化
🗣️ 情景例句
He's the publisher of the Carlson Publishing Company.
他是Carlson出版公司的老板 。
The problem is far from easy.
这问题绝非易事。
I don't think anyone knows about this. I said.
“我想没人知道这一情况，”我说。