Background impurity
[化] 本底杂质
🧩 词语组成解析
🗣️ 情景例句
Yes, I use it fairly often.
有，我常用。
Mr. Stone Jones of the United Nations.
来自联合国的世通.琼斯先生。
A parliamentary committee representing all political parties appoints a person who is suitably qualified to investigate private grievances against the State.
议会内有一个代表各政党利益的委员会，由它委派一位称职的人选专门调查个人对国家的意见。