on-the-spot investigation的用法和樣例：
例句
- Mimi, Micky and their classmates are going on a social studies field trip.
瞇瞇，米奇和他們的同班同學(xué)正繼續社會(huì )學(xué)科實(shí)地考察。 - Methods The analysis based on the historical documents and fieldwork, fully utilizing the achievements in modern scientific research.
方法基于歷史文獻與野外實(shí)地考察進(jìn)行分析。
