Pmma
[化] 聚甲基丙烯酸甲酯
🗣️ 情景例句
She just said it's too easy.
她仅仅说它太容易了。
Mr. Smith is still in his fifties.
史密斯先生仍然50几岁。
I'm very sorry, sir.You must get off the bus.None of our passengers can change this note.
非常抱歉，先生。您必须下车。我们的乘客中没人能换开这张钞票。