Polyvinyl
a. 聚乙烯基的
🗣️ 情景例句
You're ahead.
你领先呢。
The best horse needs breaking,and the aptest child needs teaching.
最好的马儿要人驯，最伶俐的孩子要人训。
at eighty can knock us out, and into our grave.
能到了80岁可能会使我们一蹶不振而进入坟墓。