Poly(hexamethylene adipamide)
[化] 聚己二酰己二胺; 尼龙-66
🗣️ 情景例句
Oh my!
噢 ，我的天！
The country is rich in natural resources.It has mineral deposits.
这个国家有丰富自然的资源。它有很多的矿床。
It seems that man was making a real effort to understand the seasons 20,000 years earlier than has been supposed.
看来人类早就致力于探索四季变迁了，比人们想像的要早20，000年。