Ethylethylene
丁烯-1
🗣️ 情景例句
She's so cute.
这只狗真可爱。
Wisdom is better than gold or silver.
智慧胜过金银。
A few minutes later, I was able to hurry away with precious chalk marks on my baggage.
几分钟后，我终于被放行，手提划着宝贵的粉笔记号的行李，匆匆离去。