Persulphate
n. [化]过(二)硫酸盐
✅ 同义词
🗣️ 情景例句
Kids today have too much freedom, it's not like the old days.
现在的小孩太自由了，不像以前。
How long have you been studying English?
你学英语多久了？
Your prices seem a little high.
你们的价钱高了一些。