技术、思维

http://blog.chinaunix.net/u/20725/showart_296963.html+　 plus　加号；正号-　 minus　减号；负号±　plus or minus　正负号×　is multiplied by　乘号÷　is divided by　除号＝　is equal to　等于号≠　is not equal to　不等于号≡　is equivalent to　全等

http://www.seismicunix.com/w/Main_Page The CWP/SU:Seismic Un*x is an open source seismic utilities package supported by the Center for Wave Phenomena (CWP) at the Colorado School of Mines(C