Polyethylenamine
聚乙烯胺
🗣️ 情景例句
We want to keep customers happy.
我们必须让顾客满意。
So what?
你说呢？
She understood I was begging for new words, for the names of the things I touched.
她懂得我是在求她教新单词--我所触摸的东西的名称。