Poval
波瓦尔(聚乙烯醇的商品名)
🗣️ 情景例句
I understand, Richard.
我懂了 ，Richard。
A creaking door hangs long on its hinges.
户枢不蠹。
The most wonderful piece of machinery on show was Nasmyth's steam hammer.
其中最奇妙的是内史密斯的蒸汽锤。