Xanthates
黄原酸盐
🗣️ 情景例句
I hope I can see you again.
我希望再到你。
What were you doing at about 4 o'clock yesterday afternoon?
你昨天下午在大约4点钟正在做什么？
I know it's not necessary. I want to do it.
我知道不必这样，可是我愿付？/span>