Polysulfuration
聚硫化作用
🗣️ 情景例句
And don't forget your camera and film, Richard.
别忘了你的照相机和底片， Richard。
Please lend an ear to this man's important news.
请注意倾听有关这个男人的重大新闻。
We'd better not just talk; let's go to the river to bathe.
我们最好别光顾说了；咱们去河里游泳吧。