Polyacetylene
聚乙炔
🗣️ 情景例句
For the food on this table.
感谢这桌上的丰盛食物。
The building of the new road has been held up by bad weather.
这条新马路的修筑因天气恶劣而受阻。
Why did you give us two T-shirts, both the same colour?
“为什么你给我俩买的T恤衫颜色都一样？”