Polyethylenamine
聚乙烯胺
🗣️ 情景例句
OK. Let's pick up the pace.
好 把节奏加快一些。
He that travels far knows much.
见多识广。
'I know,' answered Patrick, 'but I love to hear you say it!'
“这我都知道，”帕特里克说，“可我就是喜欢听你说出这此！”