Polysulfuration
聚硫化作用
🗣️ 情景例句
Can I count on your help?
我能仰仗你的协助吗？
Do you know the percentage of the damaged portion?
你们知道残损部分的百分比吗？
A girl came in and put an envelope on his desk.
一个姑娘走了进来，把一个信封放在了他桌上。