Pentaethylated
五乙基化的
🗣️ 情景例句
How much will you pay me for this job?
做这份工作你付给我多少钱？
Karl was so upset that he began to turn red with anger.
卡尔非常惊讶，红着脸开始生气了。
Do you still want them?'
您是否还要呢？”