Pentalkylated
五烃基代的
🗣️ 情景例句
Strike while the iron is hot.
趁热打铁。
What were you doing when I called you on the telephone?
当我打电话给了你时，你正在做什么？
Look at your clothes! Where have you been?
瞧你们的衣服！你们去哪儿了？