penetrating (analysis); thorough-going; thorough (understanding of the situation)[cedict]
地
deㄉㄜ˙
dìㄉㄧˋ
-ly; structural particle: used before a verb or adjective, linking it to preceding modifying adverbial adjunct[cedict]
earth; ground; field; place; land[cedict]
研究
yán jiūㄧㄢˊ ㄐㄧㄡ
research[cedict]
过
guòㄍㄨㄛˋ
(experienced action marker); to cross; to go over; to pass (time); to celebrate (a holiday); to live; to get along; excessively; too-; surname Guo[cedict]