Polyisobutylene
n. [化]聚异丁烯
🗣️ 情景例句
I'm glad to make you acquaintance.
我很高兴认识你。
Youth looks forward and age backward.
青年人向前看，老年人向后看。
Oh, yes, I can see them. But I can't reach them.
噢，是的，我能看见它们。但我够不着。