本底调查 běndǐdiàochá background investigation Definitions Defs Origin Strokes Stroke Words Sentences Sents 本底调查 本底調查 běndǐdiàochá background investigation An investigation into the background or baseline conditions of a person, situation, or environment
本底调查 本底調查 běndǐdiàochá background investigation An investigation into the background or baseline conditions of a person, situation, or environment
