Upgrading hydrocarbon
[化] 改质烃
🧩 词语组成解析
v. 升级；提高品位（upgrade的现在分词）
🗣️ 情景例句
Sorry I'm late.
很抱歉我迟到了。
I am very happy that you have come all the way from the United States to visit our company.
您不远千里从美国来我公司访问，我们感到非常高兴。
Great! Let's make it half past one.
好极啦！咱们就定在1：30 会面吧。