Background impurity
[化] 本底杂质
🧩 词语组成解析
🗣️ 情景例句
You know, man's best friend is his dog.
你知道的，类最好的朋友就是狗。
Would you please tell me your phone number so that we'll ring you up as soon as the remittance arrives?
您能否把电话号码告诉我，以便汇款一到就给您打电话？
The woman who lives next door is a doctor.
隔壁住着的那个女人是医生。