Polyacetylen
聚乙炔; 聚乙炔
🗣️ 情景例句
but there's so much energy and talent in the man,
但是他有那么多的精力和才能，
Her stockings on the sofa.
她的长袜在沙发上面。
I'm really positive that this product has all the features you have always wanted.
我确信这种产品有各种你所要的款式。