Polyset
聚酯树脂
🗣️ 情景例句
Happy birthday.
生日快乐。
Have you taken a train?
你坐过火车吗？
When a light passenger plane flew off course some time ago, it crashed in the mountains and its pilot was killed.
不久前，一架轻型客机偏离了航线，在山区坠毁，飞行员丧生。