Methasam
[商]二甲基二硫化氨基甲酸锌(橡胶硫化促进剂)
🗣️ 情景例句
How ofter have met with our competitors?
你多久遭遇我们的竞争对手一次？
What time?
什么时候？
There are a lot of people in the swimming pool.
游泳池里挤满了人。