Pbt
[化] 聚对苯二甲酸丁二酯
🗣️ 情景例句
Have you been getting enough rest?
你休息的足够吗？
One moment, please, and I'll find out what is available.
请等一等，我来查一查有什么班机。
Yes, we have to double it.
是的，我们必需加倍。