深入采访 meaning in English

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In order to help an american scholar ( right two ) to study hangzhou dialect , pan jie ( right one ) accompanied him to hangzhou opera group to gather news
为帮助美国学者史瑞明（右二）研究杭州方言，潘杰（右一）陪他在杭州曲艺团深入采访。
Our reporters also interviewed the police , the qiu family members and the neighbors in great detail in order to figure out how a 47 - year - old farmer could become an " demon " when the evil in this heart " took over " his mind
再辅以对警方、邱兴华家人和邻居等人的大量深入采访，试图勾勒出这样一个47岁的农民，是如何被心中的邪恶“劫持”而成为一个“恶魔” 。