Persulfide
[化] 过硫化物\\n[医] 过硫化物
🗣️ 情景例句
I don't know,
我不知道，
Silence in times of suffering is the best.
遭到不幸时，沈默是上策。
On the other hand, I felt sad that I wasn't able to tell my grandparents that we were safe.
另一方面，我为不能告诉我的祖父母我们十分安全而感到难过。