Polyart
高密度聚乙烯合成纸(英国 Bakelite-Xylonite 产品, 商业名称)
🗣️ 情景例句
I don't think this is my meal.
我想这不是我点的。
Who is the guy over there?
那边那个人是谁？
It is the natural frequency of emission of the hydrogen atoms in space and was discovered by us in 1951;
这个频率是空间氢原子释放的自然频率，是在1951年被人类发现的。