Pfeiffer's substance
[化] 普法伊费尔化合物
🧩 词语组成解析
🗣️ 情景例句
so I wouldn't lose them.
免得我弄丢了。
Some persons do first, think afterwards, and then repent for ever.
有些人做了再思考，从而悔恨终身。
Frank could hardly conceal his excitement, for he knew that he had made a real discovery.
弗兰克几乎无法掩饰自己兴奋的心情，因为他明白自己发现了一件珍品。