Undervulcanization
欠硫化
??? 情景例句
Hello, who's speaking, please?
喂， 誰在講話？
What''s the cause of the delay?
什么原因延誤？
The boat is not safe, said Ah Fang. Let's pull it out of the water.
“這船不安全，”阿芳說，“讓我們把它從水里拉出來吧。”