[聚焦三农]羊圈里的春天

????? (????????: Sonar) ?? ?????? ??, ???? ????? ???????? ???? ????? ???? ???? ???????? ???? ?????? ???? ??????? ??? ??. ??????? ??????? ????? ?????? ??? ??????? ??????? ????? ????? ??? ?????-???? ??? ? ???? ?????? ?? ??? ??. ??? ???????? ???? ????? SOund Navigation And Ranging??? ????????? ?????? ??.
????? ? ??????? ????? ??????? ????? ????? ????? ??. ? ??????? ?????? ?????????? ??????? ??????? ????? ??????? ????? ??? ??. ???????? ??? ?????? ???????? ??????? ??????? ???? ??? ??. ??????? ????? ????? ?????? ???? ??? ??, ?? ????? ??? ????? ???????? ????? ???? ???? ??.
? ?????? ??????? ????? ????? ???? ???? ?????? ??????? ?????? ????? ??????? ???? ??. ? ?????? ?????? ??? ????? ????? ????? ???? ??? ????? ???? ??, ???? ????? ????? ???? ??. ????????? ?????? ??????? ?? ????? ??? ??????? ???????? ??? ?????? ?????? ??????? ??? ??, ???? ???????? ????? ???????? ??? ??. ???????? ????? ???????? ?????? ??????? ?? ????? ????? ?????? ? ??? ??? ??[?].