Polyepoxide
聚环氧化物
🗣️ 情景例句
Can I speak with Mr. or Mrs. Burns?
我可以跟Burns先生或太太通话吗？
He who has not tasted bitter knows not what sweet is.
不吃苦中苦，哪知甜中甜。
She's been quite different since coming back from America.
从美国回来之后，她变化很大。