Polyethyleneimine
聚乙烯亚胺
🗣️ 情景例句
Is it possible that we forgot to buy cinnamon?
是不是我们忘了买肉桂？
Your right hand is swollen.Does it hurt?
你的右手是肿的.它受伤了吗？
it may have been because curiosity attracted them and because the scent of a possible meal attracted the sharks.
那么它们可能是出于好奇；而鲨鱼可能是闻到了可以美食一顿的香味。