Polycyclopentadiene
聚环戊二烯
🗣️ 情景例句
We have a baby now.
我们现在有一个小宝宝了。
If I had known that, I could have helped you.
假如我早知道，我就能帮你了。
An enterprise has to incur certain costs and expenses in order to stay in business.
一个企业为了继续经营，不得不支出一定的费用和开销。