军考英语：易混英语词汇辨析：at peace, in peace

　　173. at peace, in peace

　　at peace平静地;

　　in peace和平地 例：live in peace with one's neighbors

　　174. on earth, on the earth, in the earth

　　on earth在世上，在人间，到底，究竟，一点也不;

　　on the earth在地上，在地球上;

　　in the earth在地下，在泥土里

　　175. in surprise, to one's surprise, by surprise

　　in surprise惊奇地;

　　to one's surprise使某人吃惊的是;

　　by surprise使…惊慌 例：The question took the professor by surprise.