Polybutadiene
[机] 聚丁二烯
🗣️ 情景例句
Would it make you happy if I just gave up trying?
当初如果我放弃尝试的话你会高兴吗？
I apologize for that, sir.
请您原谅。
Man-made satellites have been sent up into space by many countries.
许多国家都成功地把人造卫星送入了太空。