Vulcanization accelerator na-22
[化] 硫化促进剂NA-22
🧩 词语组成解析
n. 硬化, 硫化\\n[化] 硫化
accelerator
[æk'seləreitə]
n. 加速器;催速剂;
北美洲, 国立研究院院士, 国立研究院, 国民军\\n[医] 钠(11号元素)
twenty-two
🗣️ 情景例句
Are you sending it by regular or by speed?
你要寄平信还是快递？
Did you clean this yourself?
你自己亲自清理这个？
He's only forty-one years old, and he has already been to nearly every country in the world.
他只有41岁，但他却过世界上几乎每一个国家。